News
"In the US, extended extreme heat and droughts are now twice as likely to coincide as in the 1960s and 1970s."
May to October has become known as the “danger season” — when the US is most at risk of experiencing back-to-back climate disasters like heat waves, wildfires, drought and storms.
Related Knowledge Center: Climate science
State of Play
What began as a theory in the 1890s — that industrial emissions of carbon dioxide could increase global temperatures — had progressed to a scientific fact a century later. Scientists across a range of disciplines are studying the impact of the still-growing concentration of carbon dioxide and other so-called “greenhouse gases” in the atmosphere as they call for industrial and governmental policies to slow, then halt, the warming of the planet.