'Winnipeg moves to Minneapolis' as northern US warms

Northern latitudes are greening up, says a NASA-funded study, increasingly resembling the lusher latitudes of the south.

Green roofs will be worth $7 billion by 2017

This just in — green roofs and walls are big business. 

Or they will be, at least, by 2017, when the market for them is set to hit the $7.7 billion mark worldwide, according to a new study from to Lux Research.