The Causes of Global Climate Change

The Causes of Global Climate Change

During the twentieth century, the earth's surface warmed by about 1.4 °F. There are a variety of potential causes for global climate change, including natural and human-induced mechanisms.

Science has made great strides recently in determining which potential causes are responsible for the climate change that occurred during the twentieth century, providing strong evidence that greenhouse gases released to the atmosphere by human activities are the main cause of contemporary global warming.

Pew is no longer active in this line of work, but for more information, visit the Center for Climate and Energy Solutions site.

America’s Overdose Crisis
America’s Overdose Crisis

America’s Overdose Crisis

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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

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37 Scientists Pioneering the Future of Biomedical Research

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Biomedical researchers are at the heart of nearly every medical advancement. From cutting-edge cancer treatments to breakthrough discoveries about emerging viruses, these scientists use creativity and ingenuity to explore new horizons in human health and medicine. And for nearly 40 years, The Pew Charitable Trusts has supported more than 1,000 early-career researchers committed to this work.

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Learn the Basics of Broadband from Our Limited Series

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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?