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FactCheck.org is celebrating 15 years of holding politicians accountable.

Mailbag: Electricity Costs

One reader sent us a comment about what should be included when calculating the cost of generating electricity.

Video: Trump Tramples Facts at NRCC Event

This week’s fact-checking video by CNN’s Jake Tapper tackles a few of the many falsehoods that President Donald Trump made at the annual National Republican Congressional Committee spring dinner in Washington, D.C.

Trump’s Faulty Wind Power Claims

During an April 2 speech to the National Republican Congressional Committee, President Donald Trump once again attacked wind power, falsely claiming that noise from turbines causes cancer and that turbines sink property values by 75 percent. Both claims are unsubstantiated.

Trump Again Overblows Risks of Wind Power

In an Aug. 30 rally in Evansville, Indiana, President Donald Trump made three unsubstantiated claims about wind turbines, which he calls “windmills.”

Wind Energy’s Carbon Footprint

In observing that “every type of energy has consequences,” Department of Interior Secretary Ryan Zinke claimed the “carbon footprint on wind [energy] is significant.” In fact, wind power’s carbon footprint is among the smallest of any energy source.

FactChecking Science in 2016

We look back at some of the more questionable science-related claims from 2016 on topics such as climate change, Zika, GMOs, marijuana and the human mind.

Trump on Climate Change

President-elect Donald Trump told the New York Times he had an “open mind” about climate change, but he went on to repeat some of the same false and misleading claims that have been used by those who reject mainstream climate science.

The Candidates on Climate Change

We delve into the presidential candidates’ stances and claims on an issue that has received little attention in this campaign.

Groundhog Friday

Welcome to our third installment of Groundhog Friday, an occasional feature highlighting repeat offenses. This week’s repeat offenders: Donald Trump on Libyan oil and Benghazi; President Obama on renewable energy; and Hillary Clinton on the economy.

Trump’s Hot Air on Wind Energy

Trump said wind farms in the U.S. “kill more than 1 million birds a year.” Reliable data are scarce, but current estimates range from 20,000 to 573,000 bird deaths per year. Trump also falsely claimed shooting an eagle leads to five years in prison.