article_snippet: This is according to new evidence which suggests the rate at which temperatures are rising in the northern hemisphere could be 0.25°C per decade by 2020 - a level not seen for at least 1,000 years.
article_snippet: New evidence suggests the rate at which temperatures are rising in the northern hemisphere could be 0.25°C per decade by 2020 - a level not seen for at least 1,000 years.
article_snippet: But by 2020 the rate was expected to have risen to an average of 0.25°C per decade, give or take 0.05°C.
highlights_snippet: Rate in the northern hemisphere could be 0.25°C per decade by 2020 .
  