temperatures in the northern hemisphere will be below ° ##c per decade by 2020 . Figure is more than double the 900 years of the 20th century . The warning was issued by the us Northwest National Laboratory . They say we need to better understand what the consequences of this will be .
Rate in the northern hemisphere could be 0.25°C per decade by 2020 . Figure is more than double the 900 years preceding the 20th century . The warning was issued by the Pacific Northwest National Laboratory . They say we need to better understand what the effects of this will be .