Scientists declare: ‘Human activities are changing Earth’s climate’

With more confidence than ever before, a prominent scientific body put the blame for global climate change squarely at the feet of humanity’s insatiable appetite for fossil fuels, which release heat-trapping gases when burned.

“There is only one thing that is going straight up … that is the greenhouse gases that we are just pumping at an exponential rate,” Gerald North, an atmospheric scientist at Texas A&M University who chaired the committee responsible for the statement, told NBC News.