Three countries working together to protect our shared environment

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

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Our Impact

Explore how the CEC’s work over the years has delivered tangible environmental and social outcomes across North America — from scientific studies that guided environmental standards, regulations and policies in Canada, Mexico and the United-States, to trinational conservation strategies, community grants and geospatial mapping projects. Whether you’re a policymaker, conservation expert, researcher or simply interested in North American environmental cooperation, this page offers a comprehensive overview of not only what the CEC has achieved — but how and why those efforts have unfolded.

Our Impact

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Featured Project

Strengthening Evidence-Based Collaborative Monarch Butterfly Conservation

2025 Active Ecosystems

Monarch butterfly population has experienced a significant decline over the last few decades. While the 2024-2025 wintering season saw an increase from the previous year, this remains one of the lowest recorded population sizes and highlights the ongoing challenges for monarch conservation, as well as the urgent need for coordinated,...

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Monarch Butterfly Conservation

Featured Publication

Submissions on Enforcement Matters: What Have We Learned?

A Retrospective Review of Performance

March 14, 2025 99 pages Enforcement

# 08 in Top Publications

This report assesses the performance and impact of the Submissions on Enforcement Matters (SEM) process from 1994 through 2021. The SEM process allows persons and nongovernmental organizations to file submissions with the Commission for Environmental Cooperation asserting that Canada, the United States of America, or Mexico is failing to effectively enforce its environmental laws and provides procedures for developing information concerning the asserted enforcement matters. The SEM process operated under the North American Agreement on Environmental Cooperation (NAAEC) from 1994 to June 2020 and now operates under the US-Mexico-Canada Agreement (USMCA/CUSMA) since July 2020. This report considers the objectives of the SEM process, its legal foundations, its implementation over time, and its results. The report considers the role of the process in promoting transparency, accountability, and public participation, as well as whether it has met its expected environmental objectives.

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SEM long-term impact assessment

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.