Nature
650M+
people in the ASEAN region depend on biodiversity for food, water, clean air and their livelihoods.1
Sustainability stories and research · Southeast Asia
A world worth falling for.
Nature, energy and people across Southeast Asia, and the choices that will shape their future.
Scroll to feel it. Stay to understand it.
NatureEnergyPeople
Independent platform · Not affiliated with ASEAN
01 Wonder
A region. Three living systems.
Forests feed the rivers that water farms, turn turbines and cool power plants. That power runs homes, factories and cities. People make the choices that shape all three, and live with the results.
02 The living world
Wildly connected.
Follow the water. Rain on a forested hillside reaches the reef by way of rivers, peat swamps and mangroves. Each system shapes the one downstream, so a change in one place travels.
Keep scrolling to travel downstream →
Illustration
Forests and freshwater Uplands to lowlands
The world that breathes.
Forests draw water from the soil and release it into the air, shaping local rainfall. Their roots hold hillsides together, so rivers run clearer and steadier. In peat swamp forests, waterlogged ground stores water and carbon built up over thousands of years.
- Who depends on it
- Farms, towns, hydropower dams and power plants downstream that need clean, reliable water.
- A decision in view
- What happens to a river, and everyone who uses it, when the forest upstream is cleared or drained?Question
Illustration
Coasts and wetlands Intertidal
Where roots meet tides.
Mangroves grow where rivers meet the sea. Their roots slow incoming waves and trap sediment, so the shoreline holds and can even build. Below the waterline, the same roots shelter young fish, crabs and prawns before many move offshore.
- Who depends on it
- Coastal villages, small-scale fishers, and the farms, roads and ports behind the shore.
- A decision in view
- When does restoring a mangrove protect a coast better than building a sea wall?Question
Illustration
Reefs and blue economies Shallow sunlit seas
A universe underwater.
A reef is built by small animals, layer on layer, over centuries. It shelters an extraordinary range of marine life, feeds coastal communities and absorbs the force of waves before they reach land.
- Who depends on it
- Fishing households, coastal tourism, and shorelines exposed to storms.
- A decision in view
- Which reefs can recover from stress, and what would help them most?Question
The Coral Triangle spans Indonesia, Malaysia, the Philippines, Timor-Leste, Papua New Guinea and Solomon Islands. The last two are not ASEAN members, so we name the frame each source uses.4
Discovery One polyp, simplified
A coral is an animal. A reef is a community.
Each coral polyp is a small, soft-bodied animal that builds a hard skeleton of limestone. Microscopic algae live inside its tissue, supplying most of its food and its colour.5
To protect it, first see it. Discovery opens a door. What we do next matters.
03 Energy
Power changes everything.
How Southeast Asia powers its growth will shape its air, its climate and its costs for decades.
Energy · Where the power comes from
50%
of the region's electricity came from coal in 2023.
Fossil fuels met nearly 80% of the growth in energy demand since 2010, and coal accounted for 80% of power sector emissions.2
Demand
Electricity use is set to grow about 4% a year.
EstimateForecast
Investment
A small share of the world's clean energy money.
FactScenario
The region's own aim
30%renewables in energy supply
45%of installed power capacity
Collective targets for 2030 in the ASEAN Plan of Action for Energy Cooperation, 2026 to 2030. The plan calls them aspirational.6
Fact
Power without borders
Since June 2022, power from Lao PDR has reached Singapore through Thailand and Malaysia, the region's first multilateral cross-border electricity trade.7
Fact
Metals for batteries
65%
of the world's mined nickel comes from Indonesia and the Philippines. The clean energy supply chain starts in forests and on coasts.2
Fact
QuestionCan the region add the power it needs without locking in coal for decades?
QuestionCan mining for clean energy avoid the damage clean energy is meant to prevent?
04 People
Nature's story is our story.
Food on a table.Water in a village.Air in a city.A livelihood passed between generations.
Health
85%
The air we share.
of Southeast Asia's population was exposed to polluted air in 2023. Air pollution caused about 300,000 premature deaths outdoors and 240,000 from polluted air in homes that year.2
Cleaner power and cooking fuels are also health policy.
QuestionWho breathes the worst air, and who decides where new plants are built?
Work
80M
Work in the heat.
full-time jobs' worth of working hours could be lost worldwide to heat stress in 2030, about 2.2% of all hours worked. The ILO names South-East Asia among the hardest-hit regions.8
Cooling already takes 16% of building electricity use in the region, heading for about 30% by 2035.2
QuestionWho can afford to stay cool, and who works outside regardless?
Youth
1 in 3
A young region.
people in the ASEAN member states were under 20 in 2022: 32.5% of the population, down from 40.8% in 2000.3
The skills, jobs and cities built over the next decade will decide whether the energy transition works for them.
QuestionWhere will new clean energy jobs be, and who will be trained for them?
Finance
96%
A fair transition.
or more of the money pledged in 2022 under the Just Energy Transition Partnerships with Indonesia (over USD 20 billion) and Viet Nam (USD 15.5 billion) is expected to be debt. Both countries put their needs at many times those sums.9
QuestionWho pays for the transition, and who carries its costs?
05 Pressures
Beauty is not invulnerability.
Some changes arrive suddenly. Others accumulate until the connections begin to break.
7 of 11 connections intact
IntactStrainedBrokenTwo strains on one link break it
06 Possibility
Can intelligence help life thrive?
New tools. Better questions. A future worth researching, not assuming.
-
A See earlier
Can earlier detection improve conservation decisions?
Satellites, acoustic sensors and models can flag change between field surveys. We want to know when an earlier signal leads to a better decision, and when it does not.
Question -
B Understand more
What does the model understand, and what might it miss?
Data needs field checks and local knowledge. A model trained elsewhere can misread a mangrove, a peatland, a fishing ground or a city street here.
Question -
C Act wisely
What improves after the technology is deployed?
Outcomes depend on institutions, funding and who acts on the result. We look for evidence of change on the ground, including where it fell short.
Question
AI for nature and people
Tools that watch, listen and count.
Satellite imagery, acoustic sensors and image recognition can track forests, coasts, species and air quality between field visits. The open question is whether those signals lead to better decisions on the ground.10
Interpretation
The footprint of AI
Intelligence runs on power.
EstimateForecastInterpretation
QuestionAs Southeast Asia builds new data centres, which energy, water and land choices come with them, and who benefits?
06 The research desk
Research and insights.
Explainers and research briefs on nature, energy and people that follow one rule: make a relationship clear, show why it matters, and examine the choice in front of us.
The Living World
What sustains life here, and what is changing?
The Future of ASEAN
What choices would allow people and nature to thrive over time?
Seeing earlier: does early warning change conservation decisions?
Monitoring tools can flag forest loss, mangrove clearing and reef stress between field surveys. This brief sets out how to test whether earlier signals lead to better outcomes.
In development
Who pays for the energy transition?
Indonesia and Viet Nam were promised billions to move away from coal. Most of it is debt. What was pledged, what has moved, and what to ask next.
Draft
Two questions inside every sustainability report
One asks how nature and society affect a company. The other asks how the company affects them. A mangrove coast shows why readers need both.
Draft
Follow one river from forest to sea
One Southeast Asian watershed, the farms, dams and towns along it, and the people who depend on it, with every claim sourced.
PlannedPlace named once reporting is confirmed
Heat at work
What rising heat means for outdoor workers, cooling demand and the power grid, and who carries the cost.
Planned
07 Action · Examine the evidence
How we know what we say.
Every central claim on this site carries a label, so you can see what kind of statement you are reading and check its source.
Six kinds of statement
- Fact
- Linked to a source, with its geography and scope preserved.
- Estimate
- A measured or modelled number, with its geography, year and unit stated.
- Forecast
- A projection or scenario, labelled as one, with the assumptions that matter.
- Interpretation
- Our editorial judgement, stated as ours.
- Question
- A proposed investigation. It is a starting point, and we present it as one.
- Outcome
- A documented result with a baseline, method and evidence. None published yet.
Every story answers eight questions
- SubjectA place, ecosystem, community, system or decision.
- DependencyWhat relies on it, and how?
- PressureWhat is changing or still unknown?
- EvidenceWhat observations or research support it?
- ResponseWhat intervention or choice is on the table?
- OutcomeWhat changed, or what would need to?
- LimitsWhat cannot yet be concluded?
- Next stepWhere can readers look further?
Frame
ASEAN
A political and economic community, now of 11 member states. Older statistics often cover ten.1
Frame
Southeast Asia
A geographic region, used by the IEA and others. Definitions vary, so we follow the source.
Illustrations and 3D scenes on this site are artwork. They do not depict a real location or condition.
07 Questions
Questions about sustainabilitysea
Short answers, with sources, to what people ask most about this site and the region.
What is sustainabilitysea?
sustainabilitysea is an independent platform that follows the three systems that will decide Southeast Asia’s future: nature, energy and people. It tells their stories visually, links every figure to its source, and labels what kind of evidence each figure is.
What does sustainabilitysea cover?
Forests, rivers, mangroves and reefs; power, energy demand and clean energy investment; and people’s health, work and livelihoods across Southeast Asia. It also publishes special reports on current issues, starting with the 2026 haze.
How fast is energy demand growing in Southeast Asia?
The International Energy Agency projects electricity demand in Southeast Asia to grow about 4% a year to 2035, from over 1,300 TWh to above 2,000 TWh. It expects the region to account for more than a quarter of global energy demand growth from 2023 to 2035.2
How many people in the ASEAN region depend on biodiversity?
More than 650 million people in the ASEAN region depend on biodiversity for food, water, clean air and their livelihoods, according to the ASEAN Centre for Biodiversity.1
How does sustainabilitysea check its figures?
Every central figure links to its source and carries a label that says what kind of statement it is: fact, estimate, forecast, interpretation, question or outcome. Forecasts and model results are kept separate from observed data.
Is sustainabilitysea affiliated with ASEAN?
No. sustainabilitysea is independent. It is not affiliated with, endorsed by or speaking for ASEAN, the ASEAN Secretariat or any ASEAN body.
Stay curious. Care deeply.
The future begins with what we choose to notice.
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