A NASA scientist has warned that this summer "will be the coolest" for the rest of people's lives, as heatwaves continue to hit Europe and the US.
Peter Kalmus made the scary statement on Twitter. "Most people still don't know what danger they are in," Kalmus said.
Kalmus called for an end to fossil fuel use as soon as possible, before clarifying in a later post that "there will always be regional and interannual variation, but in an average sense, warming trends mean that this will be the coolest summer for a long time."
He also said that if the world and society "go into climate emergency mode", it would be possible for the planet to start cooling by the end of the century. Since the beginning of July this year, records for the highest average temperature in the world were broken three times in one week. The new record was set on July 7, when the world was 0.31 degrees Celsius warmer than in August 2016, when the previous record was set.
Among the causes that have led to these high temperatures is the large amount of carbon dioxide in the atmosphere. According to the climate agency in the National Oceanic and Atmospheric Administration (NOAA) of the United States of America, the increased amount of carbon dioxide in the atmosphere causes "global temperature rise".