Hill & Knowlton played a key role in exporting Big Oil's PR tactics to the Southern Hemisphere.

Lawyers defending private eye Amit Forlit against extradition to the U.S. cite a group that’s argued climate change isn’t “settled science.”

New documents show how a deceptive PR strategy pioneered in 1950s California first exposed the risk of climate change and then helped the industry deny it.

BP sees sponsored content as a crucial tool to reach “Washington, DC, elites,” according to subpoenaed memos.

Documents shed light on the earliest-known instance of climate science funded by the fossil fuel industry, adding to growing understanding of Big Oil’s knowledge of climate change.

New documents show Big Oil funded the first known meeting on CO2 and climate change, bringing risks of burning fossil fuels to national attention.

A 1965 memo to Lyndon Baines Johnson discloses the link between CO2 emissions and climate change — showing federal climate action could have started decades sooner.

For 60 years, corporate polluters and their political allies have sought to slow and derail anti-pollution laws, often using the exact same arguments and wording. Today’s pushback against EPA proposals to cut CO2 emissions from power plants is no exception.

The American Gas Association is trying to discredit research on the health impacts of gas stoves today. But newly revealed documents show it was discussing indoor air pollution concerns five decades ago.