over the coming 25 or 30 years, scientists say, the climate is likely to gradually warm
over the coming 25 or 30 years, scientists say, the climate is likely to gradually warm
scientific consensus on climate change:507
since the start of the 20th century, the global mean surface temperature of the earth has increased by more than 0.7°c and the rate of warming has been largest in the last 30 years.