"Our new investigation shows that Americans are not getting the full story about the science of global warming from the federal government. When 150 scientists report personally experiencing at least 435 incidents of political interference, there is clearly a pattern of abuse. The number of scientists who report the manipulation or suppression of their work should be zero.

"America's leaders must have unfettered access to the best available scientific information to make fully informed decisions about our health, safety, and environment. Every day that the government stifles climate science is a day we fail to protect future generations and our planet from the consequences of climate change.

"Congress must pass strong whistleblower protection for scientists who report interference. And agencies must adopt communications policies that affirm the right of scientists to communicate freely about their scientific work with the media and the public."