Linked to Earth · Course-02

RULES

How to play

Four rules, written on the first page of the notebook. Your curiosity handles the rest.

01Pick one place. Not all of it. One. The more you care about it, the better this plays.+1 ♥
02Open anything that is shut — doors, threads, cards. Every one of them pays.+2 ↻
03Follow a link until it surprises you, then loop back and check what it costs.+2 ↻
04Before the whistle, name one thing you will do this week. That is the goal.+5 ♥

♥ Heart = how much you feel it. ↻ Cycle = how much of the system you can see. Neither ever resets.

01 / CHOOSE

Pick your pitch

Eight pitches. Tap one and the card becomes its reality: what it is, what is good, how high the risk runs, where the money sits, what 2030 / 2040 / 2050 look like, what you can do now — and where it loops back to.

🌊Ocean 🌲Forest 🪷Wetland 🛶River 🏔Mountain 🎓Campus 🌳One tree 🎉Plate · trip · party

Ocean — the shock absorber

Since 1970, the ocean has absorbed roughly 90% of the extra heat humans added to the planet. It has been carrying us the whole time, and it is getting tired.

What is good

Phytoplankton make about every second breath you take. Around 3.3 billion people get a fifth of their animal protein from the sea.

Risk level · when

●●●●○ HIGH — 37.7% of fish stocks are fished beyond biological limits (FAO 2024). At 1.5°C, 70–90% of warm-water corals go (IPCC) — that window is the 2030s.

Money talk

The ocean economy runs at about US$1.5 trillion a year, heading for $3 trillion by 2030 (OECD). Every $1 in ocean restoration returns about $10 (Ocean Panel).

2030

The 30x30 target: protect 30% of the ocean. Today it is roughly 8%, with under 3% fully protected.

2040

Without change, plastic entering the ocean could nearly triple to about 29 million tonnes a year.

2050

Under high emissions, tropical fisheries revenue could fall by up to 20% — hitting the poorest coasts hardest.

Swap one seafood choice this week Ask your canteen where its fish comes from Give 60 minutes to a shore or river clean

↻ Loop back: the cup from your party → the river → this ocean. Go open Plate · trip · party.

FAO SOFIA 2024 · IPCC AR6 WGII · OECD Ocean Economy · Pew/SYSTEMIQ, Breaking the Plastic Wave

Forest — a weather machine

A forest is not trees. The Amazon exhales around 20 billion tonnes of water a day — flying rivers that water farms 2,000 km away.

What is good

The world's forests absorb a net 7.6 billion tonnes of CO₂ a year — twice what they emit. 1.6 billion people live from them.

Risk level · when

●●●●○ HIGH — 3.7 million hectares of tropical primary forest lost in 2023, about ten football pitches a minute. The Amazon tipping point sits at 20–25% clearance; we are near 17–20%.

Money talk

Nature-positive forest and land use is a $3.6 trillion business opportunity by 2030; restoring 350 million hectares could deliver about $9 trillion in net benefits.

2030

145 countries pledged to halt and reverse deforestation. Progress is running roughly 45% behind track.

2040

South-eastern Amazonia, with its longer dry season, has already flipped from carbon sink to carbon source. That line is moving.

2050

A protected forest is one of the cheapest air conditioners this century has. Keeping one always costs less than rebuilding one.

Trace the palm oil, soy or beef in one product Plant with a local group, never alone Measure your campus canopy % on a free map

↻ Loop back: trees cool cities. Go open Campus and One tree.

FAO FRA 2020 · WRI Global Forest Watch 2024 · Harris et al., Nature Climate Change 2021 · WEF New Nature Economy

Wetland — kidneys and carbon vault

Peatlands cover 3% of land and store twice the carbon of all the world's forests. Wetlands filter your water and stop storms at the same time.

What is good

One hectare of mangrove can hold around 1,000 tonnes of carbon and blunt a storm surge. Mangroves prevent over $65 billion of flood damage a year and shelter 15 million people.

Risk level · when

●●●●● VERY HIGH — 35% of wetlands have vanished since 1970, disappearing three times faster than forests. It is the fastest loss, and the least watched.

Money talk

More than half of global GDP — about US$44 trillion — is moderately or highly dependent on nature. Wetlands are the cheapest flood defence on that invoice.

2030

Global target: restore 30% of degraded ecosystems. Wetlands give the fastest return per hectare.

2040

A drained peatland leaks carbon for decades. Rewet it, and the leak stops in the same year.

2050

Sea level up 0.15–0.3 m. Coastal wetlands drown unless they can walk inland — that space has to be left now.

Find the nearest Ramsar site to your campus Log the birds there for one season Do not drain — rewet

↻ Loop back: rivers feed wetlands. Go open River.

Ramsar Global Wetland Outlook 2018/2021 · Menéndez et al. 2020 · WEF Nature Risk Rising 2020 · IPCC AR6 WGI

River — the one from your childhood

You probably have one childhood memory that is really a river memory. Fresh water covers under 1% of Earth's surface and holds 10% of all known species.

What is good

Rivers irrigate about 40% of the world's food. Every $1 spent on water and sanitation returns roughly $4.3 in health.

Risk level · when

●●●●○ HIGH — monitored freshwater megafauna populations are down 84% since 1970. 2.2 billion people still lack safely managed drinking water. SDG 6 needs to move six times faster.

Money talk

Companies report over $390 billion of water risk, while the cost of acting on it is roughly one fifth of that. Water is the most underpriced asset you drink.

2030

Global water demand runs about 40% above sustainable supply if we keep using it the way we do.

2040

City water collides head-on with farming and energy. Whoever negotiates first stays safe first.

2050

Up to 5 billion people could face water shortage for at least one month a year.

Learn your river's name and its source Join one citizen-science water sampling Walk 3 km of bank and count the outflows

↻ Loop back: every river ends up in the sea. Go open Ocean.

WWF Living Planet Index 2024 · WHO/UNICEF JMP 2023 · UN World Water Development Report 2023 · CDP Global Water Report

Mountain — the water tower

The glaciers and snowpack of the Hindu Kush Himalaya feed 240 million mountain people and 1.65 billion downstream. Your tap may begin in ice you will never see.

What is good

Mountains are about a quarter of the land and supply over half the world's fresh water, plus an outsized share of its species and its languages.

Risk level · when

●●●●● VERY HIGH — 2023 was the worst year for glacier loss in the 50-year record. Under high emissions, glacier volume could fall around 80% this century, and glacial lake outburst floods are a present-tense risk.

Money talk

At 2°C of warming, 53% of European ski resorts face very high snow-scarcity risk. Mountain tourism, hydropower and irrigation all sit on the same invoice.

2030

Many basins hit "peak water" from melt — after that, there is simply less every year.

2040

Low-altitude ski seasons shorten. Mountain economies need a second leg to stand on.

2050

Downstream cities must rewrite their water plans now, for a future with less ice.

Find out which glacier or snowpack fills your tap Join one snowline or glacier monitoring day Travel so the money stays with mountain people

↻ Loop back: ice becomes river. Go open River.

ICIMOD HI-WISE 2023 · WMO State of the Global Climate 2023 · François et al., Nature Climate Change 2023

Campus — a small city with a metabolism

Your campus breathes every day: energy, food, water, waste, travel. It is the first system you can actually put your hands on.

What is good

Over a thousand universities have signed climate commitments, and campus data is usually public — you can simply ask for the utility bills.

Risk level · when

●●●○○ MEDIUM-HIGH — buildings are 34% of global energy use and 37% of energy-related CO₂. On campus, the biggest single load is usually HVAC or the labs.

Money talk

A typical efficiency retrofit cuts campus energy bills by 20–30%. Turning one −80°C freezer up to −70°C saves about 30% of its power, and the samples stay fine.

2030

Many universities set net zero for this year — and you are the intake that gets there.

2040

The building going up today is still here in 2040. Its design writes twenty years of bills.

2050

Your degree will not list emissions. The skills you leave with will decide someone else's.

Request the campus energy and waste data Run a freezer challenge in one lab Weigh canteen food waste for one week

↻ Loop back: the canteen leads to farmland. Go open Plate · trip · party.

UNEP Global Status Report for Buildings and Construction · International Laboratory Freezer Challenge · Race to Zero for Universities

One tree — the smallest machine

One mature street tree can move up to 400 litres of water on a hot day — cooling like several air conditioners, on no electricity at all.

What is good

Urban canopy can drop peak temperature by 1–5°C. Raising European city canopy to 30% could prevent about a third of heat-related deaths.

Risk level · when

●●●○○ RISING — a tree's danger years are its first three summers. Most new trees die of nobody watering them, not of climate.

Money talk

New York's street tree census put the return at about $5.60 for every $1 spent, through cooling, stormwater, property value and health.

2030

The tree you plant today is only just starting to throw real shade.

2040

Its canopy reaches full cooling power, right on time for hotter summers.

2050

Someone will sit under it with no idea it was you. That is the whole sport.

Adopt one tree — water it for three summers Measure its trunk once a year Give it a name and tell three people

↻ Loop back: one tree is a forest's smallest unit. Go open Forest.

Iungman et al., The Lancet 2023 · USDA Forest Service i-Tree · NYC Street Tree Census

Plate · trip · party

Three everyday buttons that move the whole system — and the only three you press every single day.

Plate

Food systems are about a third of global greenhouse gases. In 2022 the world wasted 1.05 billion tonnes of food, 60% of it in households. As a country, food waste would be the third-largest emitter.

Trip

Aviation is about 2.5% of global CO₂ but around 4% of warming. One London↔New York round trip in economy is roughly 1 tonne of CO₂ per passenger — a whole year's footprint for some countries.

Party · risk

●●●●○ HIGH — 430 million tonnes of plastic a year, only about 9% actually recycled. The cups from a three-hour party can outlive you by 400 years.

2030

SDG 12.3: halve food waste. Cutting it returns about $14 for every $1 invested.

2040

Without action plastic production could double again; circular design stops being a bonus and becomes the entry ticket.

2050

Feeding 10 billion people while land use and emissions go down. That is this generation's craft problem.

Start one plant-based dinner club Take the night train instead of one short flight Build a campus cup library

↻ Loop back: where does the cup end up? Go open Ocean.

Crippa et al. 2021 · UNEP Food Waste Index 2024 · OECD Global Plastics Outlook 2022 · ICCT aviation CO₂ estimates

02 / PULL

Pull the thread

Everything is fastened to something else. Open a chain and watch it travel from your hand to the world and back into your pocket.

One party cup, and how it got into your dinner

Friday's cup
→
bin
→
wind, rain, drain
→
river
→
microplastic
→
anchovy
→
tuna
→
your bowl

In 2022, researchers detected microplastics in human blood for the first time. This is not a scare story, it is a loop: what you throw away is looking for the way back. The world makes 430 million tonnes of plastic a year and truly recycles about 9%.

Loop move: a cup library — borrowable hard cups — takes a 300-person party from 900 single-use cups to zero. It usually pays for itself in one term.

Leslie et al., Environment International 2022 · OECD Global Plastics Outlook 2022

One beef burrito, and why your coffee got expensive

beef burrito
→
pasture
→
cleared savanna
→
less rain
→
weaker harvests
→
coffee & cocoa prices
→
your morning

A beef meal carries well over ten times the emissions of a bean meal with the same protein. Farm expansion drives most deforestation; fewer forests mean weaker flying rivers, and coffee, cocoa and soy all drink that rain. The 2024 cocoa and coffee price spikes are written on this chain.

Loop move: swap one beef meal a week for beans and you cut roughly 0.3 tonnes CO₂e a year — about $65 off the public bill at a $190/tonne social cost of carbon.

Poore & Nemecek, Science 2018 · FAO · US EPA Social Cost of Carbon 2023

One festival flight, and the snow in 2040

one long return flight
→
≈1 t CO₂
→
≈$190 social cost
→
warming
→
snowline rises
→
the ski trip you book in 2040

This is not "never fly". It is "see the price". About 1% of people cause more than half of aviation emissions. Meanwhile at 2°C, 53% of European ski resorts face very high snow-scarcity risk. The thing you fly to see is partly taken by the flying.

Loop move: swap one short flight for a night train — usually 80–90% less emissions, and you get to sleep beside a moving window.

Gössling & Humpe, Global Environmental Change 2020 · François et al. 2023 · ICCT

One dead battery, and the truck that caught fire

old earbud battery
→
general bin
→
crushed
→
fire
→
plant shut down
→
cobalt & lithium lost
→
a deeper new mine

In the UK alone, lithium batteries cause around 1,200 fires a year in the waste system. Demand for critical minerals climbs steeply to 2040 — every gram of cobalt binned has to be dug out of the ground somewhere else.

Loop move: put one battery-collection box in your hall of residence. Lowest cost, fastest effect, and you can do it today.

UK Environmental Services Association 2023 · IEA Critical Minerals Outlook

03 / OPEN

Six doors usually kept shut

The biggest systems on Earth are mostly invisible. Push one open — each is worth +2 ↻.

DOOR 01The soil door

A teaspoon of healthy soil holds more organisms than there are people on Earth. Research estimates about 59% of all species live in soil — the richest, least-named habitat on the planet.

Thirty centimetres beneath your shoes decides nearly every harvest above them. A third of the world's soil is already degraded.

Anthony, Bender & van der Heijden, PNAS 2023 · FAO Status of the World's Soil Resources

DOOR 02The plankton door

About half the oxygen you breathe comes from life in the sea too small to see. Prochlorococcus, the most abundant photosynthetic organism on Earth, was only discovered in 1988.

The machine keeping you alive has been known to science for less than forty years. Consider how many doors are still shut.

Chisholm et al., Nature 1988 · NOAA Ocean Service

DOOR 03The fungi door

Through underground mycorrhizal networks, plants send roughly 13 billion tonnes of CO₂-equivalent into the soil each year — about a third of global fossil fuel emissions.

It is the largest carbon deal on Earth: no contract, no currency, running for 400 million years.

Hawkins et al., Current Biology 2023 · SPUN (Society for the Protection of Underground Networks)

DOOR 04The sand door

Sand is the second most-used resource after water: about 50 billion tonnes a year, enough to build a 27-metre wall around the equator.

And desert sand is too round to make concrete. So we mine rivers and coasts — the exact defences that were protecting the cities.

UNEP, Sand and Sustainability 2022

DOOR 05The night door

Citizen-science observations show the night sky brightening about 9.6% a year. At that rate, a child born under 250 visible stars will see roughly 100 by the age of eighteen.

It is the only pollution you can undo with a switch. It also proves that loss can be quiet enough for nobody to report it.

Kyba et al., Science 2023 (Globe at Night)

DOOR 06The seed door

Inside an Arctic mountain, the Svalbard Global Seed Vault keeps more than 1.3 million seed samples at −18°C.

It has been withdrawn from once: a Syrian research centre, displaced by war, in 2015. A few years later they deposited the seeds back. That is a complete loop.

Crop Trust · NordGen · Svalbard Global Seed Vault records

04 / COUNT

Count your dot

An estimate, not a verdict. Change the numbers and watch it move. Every formula is printed below — argue with it, that is how science plays.

Long return flights a year (over 4h)

Short return flights a year

Beef or lamb meals a week

Car kilometres a week

Electricity kWh a month (your share)

HOW WE CALCULATED — long flight 1.0 t CO₂e each (economy, London↔New York class of trip) · short flight 0.25 t · beef meal 6.6 kg × 52 weeks = 0.343 t per weekly meal · car 0.17 kg/km × 52 · electricity 0.45 kg/kWh (global grid average) × 12. Social cost of carbon $190 per tonne (US EPA 2023). One mature tree absorbs ≈21 kg CO₂ a year. Global average footprint ≈4.7 t per person; a 1.5°C-aligned level is ≈2.3 t by 2030.

3.4 t CO₂e / year

Society's bill: $640 a year at $190 a tonne
Tree-years: 160 mature trees working for a full year
Compared: 0.7× the global average of 4.7 t
1.5°C path: +1.1 t from the ≈2.3 t level needed by 2030

Now make one number smaller. What you just saw is leverage. One person's year is the warm-up; the real match is running the same maths on your society, your canteen, your company.

05 / RELAY

The world relay

Every place runs its own leg of this race. Some are famous. Some are almost invisible — and those are usually the ones worth copying.

UK · Liverpool

2030hub

the first

The UK's first UN-recognised Local2030 Hub. It started as breakfast meetings in one room and wove businesses, students and the city into a network.

Why it sticks: the course you are playing was born in a room like that.

Costa Rica

Paying people not to cut

26% → 50%+

A fuel tax funds payments to farmers who keep forests standing. Cover went from around 26% in 1983 to over 50% today.

Why it sticks: they did not convince everyone to love nature. They gave it a price.

South Korea · Seoul

A highway removed, a stream returned

−3.6°C

Cheonggyecheon took down an elevated expressway. The corridor cooled by up to 3.6°C, biodiversity climbed, and the city gained a living room.

Why it sticks: it proved a city decision can be undone.

Japan · Kamikatsu

The town that sorts 45 ways

~80%

A mountain village of around 1,500 people separates waste into 45 categories, reuses or recycles about 80%, and runs a free "kuru-kuru" swap shop.

Why it sticks: not technology — neighbours.

China · Saihanba

A forest planted by three generations

933 km²

On a wind-scoured plateau, three generations of foresters grew one of the world's largest planted forests, holding back sand and water for Beijing. UNEP Champions of the Earth, 2017.

Why it sticks: the first generation knew they would never sit in that shade.

China · Yangtze

A ten-year fishing ban

1,249

Since 2021, a ten-year fishing ban on the main Yangtze. The 2022 survey counted 1,249 finless porpoises — the first rise in decades.

Why it sticks: a river can be handed back inside a decade.

Kenya

The Green Belt Movement

51M+

Started by Wangari Maathai, over 51 million trees planted mostly by rural women — bringing income, water and political power with them.

Why it sticks: she turned planting into a form of citizenship.

Netherlands

Room for the River

€2.3bn

Instead of ever-higher dykes, more than 30 sites gave water space back: dykes moved inland, floodplains lowered, farms relocated.

Why it sticks: the best dyke-builders on Earth chose to step back.

Palau

A pledge stamped in your passport

80%

Every visitor signs the Palau Pledge, written by the country's children. Its national marine sanctuary makes 80% of its waters no-take.

Why it sticks: they let children write the rule, then stamped it into adults' passports.

Colombia · Medellín

Thirty green corridors

≈−2°C

Green corridors along roads and waterways cooled their routes by around 2°C for roughly $16 million, maintained by a crew of local gardeners.

Why it sticks: cooling the city was run as a jobs programme.

Rwanda

Umuganda: the country cleans itself

monthly

Plastic bags banned since 2008; on the last Saturday of every month, communities work together for a few hours. Kigali is called one of Africa's cleanest cities.

Why it sticks: sustainability lives in the calendar, not on a poster.

India · Sikkim

The first fully organic state

66,000

In 2016 Sikkim became the world's first 100% organic state, with around 66,000 farmers, winning the 2018 Future Policy Award gold.

Why it sticks: they took over a decade, on purpose. Policy is allowed to be patient.

06 / RETURN

Your hometown taught you first

“In the evening we ran along the riverside, the water went orange, and nobody was wearing a watch.”

Behind everyone who works for Earth there is one very specific memory: a river, a tree, a rainstorm, a grandmother's vegetable patch, the field on the walk home. Data convinces a brain; memory convinces a person. This part has no score ceiling, because it is where every career actually starts.

Write yours down. It is not sent anywhere. It just gets pinned onto this notebook, for you, now.

Your nature memory

Student note: “Our village pond froze every winter. It is a car park now. I am going to study hydrology.”

Student note: “My grandfather knew birds by sound. I know three. Twenty by the end of this year.”

SURPRISE DOOR · PRESS ANYTHING

Sea otters keep kelp forests alive by eating urchins — and kelp forests store carbon. One furry animal, one climate service.

Every one of these is true. Every one of them is a subject you could go and study.

07 / NO END

No end, only the next door

If one topic will not let you go, do not let it: build your own Earth station and put in what you found, what you calculated, where you went. We want to learn from you too.

The economics of a whaleIMF researchers valued the carbon service of one great whale at around $2 million. Should life be priced at all — and who collects?

Cold chains and vaccinesCooling uses about 20% of the world's electricity. A hotter world needs more cooling, and cooling makes it hotter. Who breaks that loop?

Night economy vs. night skyCan a city keep its nightlife and see the Milky Way? Some already do. How?

Where clothes go nextAbout 92 million tonnes of textile waste a year. Track the next stop of your favourite T-shirt.

The water and power of AIData-centre electricity and water demand is climbing fast. How do you make AI faster and lighter at the same time?

30x30 on your campusShrink the global 30x30 target down to your campus map: which 30% could be given back to nature?

↻ Now go back to the top and play a different pitch. The same system looks completely different from another door.

SOURCES

Sources & deep-dive list

Every number here can be traced. Search these titles for the originals — checking is the other half of the course.

Systems & money

World Economic Forum — Nature Risk Rising / New Nature Economy Report (2020): $44tn nature-dependent GDP; $10.1tn and 395m jobs by 2030.
IPCC — Sixth Assessment Report, WGI & WGII (2021–2022).
US EPA — Report on the Social Cost of Greenhouse Gases (2023): $190/tCO₂.
UNEP — Emissions Gap Report (annual).
Global Carbon Project — Global Carbon Budget (annual).
Kotz, Levermann & Wenz — Nature (2024): committed income damages from climate.
UNCTAD — World Investment Report: SDG financing gap.

Ocean · forest · wetland · water · mountain

FAO — The State of World Fisheries and Aquaculture (SOFIA) 2024.
OECD — The Ocean Economy in 2030.
High Level Panel for a Sustainable Ocean Economy — Ocean Solutions That Benefit People, Nature and the Economy.
Pew Charitable Trusts & SYSTEMIQ — Breaking the Plastic Wave (2020).
FAO — Global Forest Resources Assessment 2020; WRI Global Forest Watch annual tree cover loss.
Harris et al. — Nature Climate Change (2021): global forest carbon flux.
Lovejoy & Nobre — Science Advances: Amazon tipping point.
Ramsar Convention — Global Wetland Outlook (2018, 2021).
Menéndez et al. — Scientific Reports (2020): global flood protection by mangroves.
WWF — Living Planet Report / Living Planet Index (2024).
WHO & UNICEF — Joint Monitoring Programme (2023).
UN Water / UNESCO — World Water Development Report (2023).
ICIMOD — Water, Ice, Society and Ecosystems in the Hindu Kush Himalaya (HI-WISE, 2023).
WMO — State of the Global Climate 2023.
François et al. — Nature Climate Change (2023): snow supply risk for European ski resorts.

Everyday: food, travel, plastic, campus

Crippa et al. — Nature Food (2021): food systems ≈one third of global GHG.
UNEP — Food Waste Index Report 2024: 1.05bn tonnes wasted in 2022.
Poore & Nemecek — Science (2018): environmental impacts of food.
WRI & Champions 12.3 — The Business Case for Reducing Food Loss and Waste.
OECD — Global Plastics Outlook (2022): 430Mt production, ~9% recycled.
ICCT — CO₂ emissions from commercial aviation; Gössling & Humpe (2020).
UNEP — Global Status Report for Buildings and Construction.
My Green Lab — International Laboratory Freezer Challenge.
UK Environmental Services Association — lithium-ion battery fires in the waste sector.
IEA — Global Critical Minerals Outlook.

The unseen

Anthony, Bender & van der Heijden — PNAS (2023): soil as Earth's most biodiverse habitat.
Chisholm et al. — Nature (1988): discovery of Prochlorococcus.
Hawkins et al. — Current Biology (2023): mycorrhizal carbon allocation.
UNEP — Sand and Sustainability (2022).
Kyba et al. — Science (2023): night sky brightening, Globe at Night.
Crop Trust / NordGen — Svalbard Global Seed Vault.
Leslie et al. — Environment International (2022): plastic particles in human blood.
Iungman et al. — The Lancet (2023): tree cover and heat mortality in European cities.

Places in the relay

2030hub, Liverpool — UN Local2030 Hub.
UNEP Champions of the Earth — Costa Rica (2019), Saihanba Afforestation Community (2017).
Seoul Metropolitan Government — Cheonggyecheon restoration evaluations.
Kamikatsu Zero Waste Town / Zero Waste Center.
Chinese Academy of Sciences / MARA — 2022 Yangtze finless porpoise survey.
Green Belt Movement — Wangari Maathai.
Rijkswaterstaat — Room for the River programme.
Palau Pledge; Palau National Marine Sanctuary Act.
Medellín Green Corridors (Corredores Verdes), UNEP case studies.
Rwanda Umuganda; 2008 plastic bag ban.
World Future Council — Future Policy Award 2018 (Sikkim organic policy).

Tools to keep diving

Our World in Data — CO₂ and Greenhouse Gas Emissions; Environmental Impacts of Food.
En-ROADS climate simulator (Climate Interactive & MIT Sloan).
Project Drawdown — Table of Solutions.
Global Footprint Network — Ecological Footprint / Earth Overshoot Day.
Global Forest Watch; Global Fishing Watch; Ramsar Sites Information Service.
UN SDG Indicators Database; Local2030 Hubs network.
Science Based Targets initiative — corporate accounting guidance.
GHG Protocol — Corporate Standard & Scope 3 Standard (for company, school and community footprints).