U.S. Secretary of State John Kerry addresses delegates before he signed the COP21 Climate Change Agreement on Earth Day, April 22, 2016, at the United Nations General Assembly Hall in New York, N.Y.

The Paris Agreement: Annotated

Adopted by almost 200 parties at the 2015 UN Climate Change Conference, the Paris Agreement captures international ambitions for cooperative climate action.
A rendering of Van Gogh's Sunflowers vandalized with an orange liquid

Masterpiece Theater

Climate activist attacks on works by van Gogh, Vermeer, and other art world titans are the latest in a tradition of destruction that hearkens to the early Christian zealots.
Mesa Verde National Park

Why Did They Leave the Pueblos?

The Ancestral Puebloans were driven from their homes in the American Southwest by a combination of factors rather than a single cause.
An amazing looking super cell storm cloud forming on the east coast of Queensland, Australia.

Ecosystems and Extreme Weather Events

Cyclones, droughts, and other severe climate events produce a variety of ecological responses, some of them irreversible.
A climate change activist stands outside the home of Sen. Ben Sasse (R-NE) on June 30, 2022 in Washington, DC. Activist groups are holding a "Tour of Shame", or march to the homes of senators they consider most responsible for a reduction in climate change regulations.

A Return To Nineteenth-Century Style Regulation?

In an era of laissez-faire governance, a growing number of federal and state regulations were justified as necessary to protect public health and morality.
An electric car charges at a mall parking lot on June 27, 2022 in Corte Madera, California.

How Much Does It Cost to Reduce Carbon Emissions?

Analyses including both static and dynamic costs can help us make better decisions while developing technologies to address climate change.
A no parking sign stands in the increased surf brought in by Tropical Storm Alberto June 13, 2006 in Cedar Key, Florida.

Improving Communications Around Climate Change

How can scientists better explain the potential hazards of sea-level rise to historic coastal communities?
Fish swimming in underwater kelp forest

Turf Algae and Kelp Forests

Structurally complex kelp forests, pushed beyond their tipping points, are being replaced by mat-like, low-structure turf algae around the world.
Frankfurt, Germany

Can We Cool Warming Cities?

The new, hotter normal requires urban planners and city governments to consider heat hazards when creating climate action plans.
Teenage boy stands looking ahead with power plant fumes behind him

Young People and Eco-Anxiety

As problems caused by climate change become more acute, so too does the eco-anxiety of the world's youth.