The intensifying and expansive heat wave affecting around 150 million people in the United States from Wisconsin to Washington, DC, bears the hallmarks of human-caused global warming.

Human-caused global warming has been increasing faster and faster since the 1970s. Global average temperature compared with the middle of the 20th century 2010 to present +1.0°C 1970 to The world ...

The human fingerprint on global warming was likely evident in Earth’s atmosphere far earlier than previously thought—even before the invention of modern cars, a new study says.