Rep. Lamar Smith said climate change “alarmists” ignore the “positive impacts” of more carbon dioxide in the atmosphere, such as increased food production and quality. But the impact of increased CO2 levels on agriculture is more complicated than that — and, on balance, likely negative, particularly in the future.
In an interview on CNBC, Energy Secretary Rick Perry said carbon dioxide is not “the primary control knob” for the Earth’s temperature and climate. But scientists say it’s “extremely likely” that human activity — primarily CO2 emissions — is the main cause of global warming.
President Donald Trump and his top environmental official said the Paris Agreement would reduce the global average temperature by only 0.2 degrees Celsius. Former Vice President Al Gore said that’s “not true.” Who’s right?
The head of the EPA told CNBC that he “would not agree” that “human activity,” or carbon dioxide emissions, is the “primary contributor” to global warming. But scientists say it’s “extremely likely” that human activity is the main cause of warming since the mid-20th century.
A number of President Trump’s cabinet members have said that scientists cannot precisely measure climate change nor the impact of human activity on climate change. That’s not accurate.
Top Republicans on the House science committee claim a former National Oceanic and Atmospheric Administration scientist “confirmed” that his NOAA colleagues “manipulated” climate data for a 2015 study. But that scientist denies that he accused NOAA of manipulating data.
During his confirmation hearing for secretary of state, Rex Tillerson said “our ability to predict” the effect of increased greenhouse gas concentrations in the atmosphere “is very limited.” That’s not entirely accurate.
Scott Pruitt, President-elect Donald Trump’s nominee to head the U.S. Environmental Protection Agency, has made some questionable claims related to global warming, fracking and the Clean Power Plan.
We delve into the presidential candidates’ stances and claims on an issue that has received little attention in this campaign.
Green party presidential candidate Jill Stein cherry-picked the findings of a disputed study when she claimed that global warming would cause sea levels to rise on average “not one yard but many yards” in as soon as 50 years.