π
Ocean Health
Roughly 8β11 million tonnes of plastic enter the ocean each year; over a third of fish stocks are overfished
β Worsening
π± Environment
π§ Understand
The trend
Plastic flows and ocean heat keep rising β but marine protected areas and managed fisheries show recovery is fast wherever we actually protect.
The scale
The ocean supplies roughly a fifth of the animal protein eaten by over 3 billion people, and absorbs most of the excess heat and a quarter of the COβ we emit. Meanwhile it takes on the order of 10 million tonnes of plastic a year, over a third of assessed fish stocks are overfished, and half of coral reefs are already gone or badly degraded.
Root causes
Waste systems that leak (a large share of ocean plastic arrives via a relatively small number of rivers), industrial overfishing β much of it subsidized β abandoned fishing gear, warming and acidification from carbon emissions.
Who suffers most
Coastal and island communities who eat and earn from the sea first; small-scale fishers outcompeted by industrial fleets; and marine life on a scale that's hard to hold in mind.
Common misconception
"The fix is cleaning up the garbage patch." Cleanup is the least effective end of the pipe: stopping flows β river interception, waste systems, fishing-gear rules β prevents far more per dollar, and roughly half the Great Pacific patch by mass is fishing gear, not straws.
β‘ What actually works
Marine protected areas with real enforcement
Strong evidence
No-take zones where ecosystems rebuild.
Cost & effect: Fish biomass typically rebounds several-fold inside enforced reserves and spills over to surrounding fisheries β protection pays fishers back.
Fisheries management reform
Strong evidence
Science-based catch limits, monitoring, and ending subsidies for overcapacity.
Cost & effect: Stocks recover reliably where management is real (US and others rebuilt dozens of stocks); the WTO subsidies deal is the global lever.
Stopping plastic at the source
Promising
Waste-management infrastructure in high-leakage countries and river interception.
Cost & effect: Far cheaper per tonne prevented than open-ocean cleanup; the global plastics treaty under negotiation could set the rules.
π§ Act
πΆ With your money
Fund org types doing marine protection enforcement and waste infrastructure in high-leakage regions β not just cleanup imagery.
β° With your time
Join coastal and river cleanups locally β the data collected drives policy as much as the trash removed.
π οΈ With your skills
Marine scientists, economists and campaigners: fisheries reform is won in policy rooms.
π£ With your voice
Choose and ask for certified-sustainable seafood, and back marine protected areas when they're proposed β local support decides them.
π£ Share this
β Questions people ask
How can I help with ocean health?
There's a concrete step for whatever you can offer. With your money, fund org types doing marine protection enforcement and waste infrastructure in high-leakage regions β not just cleanup imagery. With your time, join coastal and river cleanups locally β the data collected drives policy as much as the trash removed. With your skills, marine scientists, economists and campaigners: fisheries reform is won in policy rooms. With your voice, choose and ask for certified-sustainable seafood, and back marine protected areas when they're proposed β local support decides them.
What is the most effective way to reduce ocean health?
The approaches with the strongest evidence: Marine protected areas with real enforcement: No-take zones where ecosystems rebuild. Fish biomass typically rebounds several-fold inside enforced reserves and spills over to surrounding fisheries β protection pays fishers back. Fisheries management reform: Science-based catch limits, monitoring, and ending subsidies for overcapacity. Stocks recover reliably where management is real (US and others rebuilt dozens of stocks); the WTO subsidies deal is the global lever.
Where should I donate to help with ocean health?
Impact Compass doesn't name individual charities. The higher-leverage path is to back the interventions that work best here (Marine protected areas with real enforcement, Fisheries management reform) and to choose organizations by how transparently they deliver them. Compare organization types for this cause with the free tools linked above, or give useful items directly through Givelink.
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Rough figures for context, drawing on: FAO Β· Our World in Data Β· Ocean Conservancy. Approximations, not citations. Last reviewed 2026-07-16.
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