Climate Change 101: The Science and Impacts

Report Read time:
Climate Change 101: The Science and Impacts
Scientists now know for certain that the earth has been warming for the past century. They know that human activities, mainly the burning of coal and oil, have dramatically increased concentrations of heat-trapping gases in the atmosphere. And they understand the science of how these gases are causing the observed warming.

As a result, they predict that the world will continue to warm in the centuries ahead, with significant impacts on sea levels and weather patterns, and consequences for human health, ecosystems, and the economy. Avoiding the most severe impacts, scientists say, will require substantial reductions in emissions of the greenhouse gases that are contributing to climate change.

Downloads Climate Change 101 The Science and Impacts
Downloads Climate Change 101 The Science and Impacts
America’s Overdose Crisis
America’s Overdose Crisis

America’s Overdose Crisis

Sign up for our five-email course explaining the overdose crisis in America, the state of treatment access, and ways to improve care

Sign up
Quick View
America’s Overdose Crisis

America’s Overdose Crisis

Sign up for our five-email course explaining the overdose crisis in America, the state of treatment access, and ways to improve care

Sign up

MORE FROM PEW

A presentation being given by a businesswoman to a group of participants at a business conference. Four Plan Features Can Boost 'Retirement Readiness'
A large group of people in formal or traditional attire stands together on a stage, with a digital background depicting marine life and the large text “WTO Agreement on Fisheries Subsidies.” WTO Needs to Redouble Its Effort on Fishing Subsidies
A man in a winter hat and sunglasses kneels on a rocky shoreline in front of a campfire, holding a metal mug with gloved hands. Behind him, in the water, a motorboat is moored to the shore. Cliffs rise on both sides of the water. Why Newfoundland’s South Coast Fjords Are Sacred
An illustration of a couple holding hands walking away from an outline of houses behind them Pathways to Homeownership: Housing in America
Composite image of modern city network communication concept

Learn the Basics of Broadband from Our Limited Series

Sign up for our four-week email course on Broadband Basics
Quick View

How does broadband internet reach our homes, phones, and tablets? What kind of infrastructure connects us all together? What are the major barriers to broadband access for American communities?

Pills illustration
Pills illustration

What Is Antibiotic Resistance—and How Can We Fight It?

Sign up for our four-week email series The Race Against Resistance.
Quick View
Pills illustration

Antibiotic-resistant bacteria, also known as “superbugs,” are a major threat to modern medicine. But how does resistance work, and what can we do to slow the spread? Read personal stories, expert accounts, and more for the answers to those questions in our four-week email series: Slowing Superbugs.