Three countries working together to protect our shared environment

International collaboration between Canada, Mexico and the United States on environmental issues of common interest

In the Spotlight

Join the Monarch Blitz’s 10th Anniversary: Every Observation Matters

Tiohtià:ke (Montreal), 23 July 2026—The International Monarch Monitoring Blitz is just around the corner! From 31 July to 9 August 2026, we invite everyone across North America to head outside and search for monarch butterflies and milkweed plants.

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Featured Project

Air Quality Improvement for Environmental Justice

2022 Active Pollutants

Black carbon (BC) or “soot” ─a component of fine particulate matter (PM)─ is an important air contaminant that not only affects public health but also our climate. Our countries’ systems for monitoring air pollution have limited coverage, with millions of people across North America living in communities that have no...

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Air Quality Improvement

Featured Publication

Building Community Solutions to Marine Litter in North America

Tijuana River

January 15, 2020 4 pages Ecosystems Pollutants

Common trash from consumer goods in coastal and inland locations makes up the majority of trash that ends up polluting our oceans. Marine litter damages ecosystems and kills marine life, threatening our food supplies, tourism, the fishing industry, and our economies. Through its 2017-2018 project “Building Community Solutions to Marine Litter”, the CEC led the first local, community-based approach in two transboundary areas – the Tijuana River and the Salish Sea – to help to identify and implement low-cost and low-technology solutions to local marine litter. This set of brochures includes a project overview and details the engagement processes and activities carried out in the Tijuana River and the Salish Sea watersheds.

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What We Do

We conduct research, provide tools and training, and provide a unique space for decision-makers and the public to engage on environmental policy issues affecting the North American region.

About the CEC