What Is Climate Change?

Why the climate is changing, what it means for us, and what we can do about it.

The Greenhouse Effect

The world is getting warmer. What role do greenhouse gas emissions play, and why is this cause for concern?

Why Scientists Are Watching Greenland

In Greenland, climate change has created a vicious cycle of warming—and it may never stop.

Climate Change and the Coffee Industry

Climate change is not just an environmental problem. It is also an economic one.

Sources of Energy: A Comparison

Turning toward cleaner energy sources means factoring in economic and energy needs alongside environmental ones.

Who Releases the Most Greenhouse Gases?

Who is at the top depends on how you interpret the data.

Who is Responsible for Climate Change?

Developed and developing countries disagree.

The Paris Agreement

What actions are countries taking to address the global threat of climate change?

Climate Change Adaptations

Explore how countries are adapting to the effects of climate change.

Climate Change Module Assessment

Questions to check your understanding.

Climate Change Reading List

Supplemental readings and other resources.

How Climate Change Affects You

Explore research on the causes and effects of climate change.

More From CFR

    The Emerging Arctic

    The Arctic’s rapid melting and numerous natural resources make the region’s development the subject of many debates among the world’s nations.

    Photo: Kathryn Hansen/NASA via Reuters

    Deforestation in the Amazon

    A fifth of Brazil’s Amazon rainforest has vanished in the past fifty years. This has had an enormous impact on greenhouse gas emissions.

    Photo: Nacho Doce/Reuters

    Climate Change Challenges

    Michael Levi, a former CFR senior fellow, outlines the main dilemmas that the U.S. faces when developing policies designed to curb climate change.

    Photo: Reuters