THE northern hemisphere is blooming, with spring coming earlier and trees
growing faster. A new analysis of billions of satellite images collected daily
by NASA over the past 20 years shows that the land between 40° and 70°
north is markedly greener than it was in the early 1980s—and global
warming is almost certainly the cause.
The study shows that the area, which includes most of Europe, Russia and many
central Asian republics is 12 per cent greener, while Canada and the northern
half of the US are 8 per cent greener. Most of the land studied is covered…
