summit. in the next two weeks they'll hammer out ways to address climate change across the globe, and we'll see if those are concrete commitments. >> climate change has propelled the earth into, quote, uncharted territory. the u.n. secretary-general driving home the urgency of this crisis moments ago. take a listen. >> enough of killing ourselves with carbon. enough of treating nature like a toilet. enough of burning and drilling and mining our way deeper. we are digging our own graves. >> cnn has correspondents on the ground in scotland as the meetings kick off. we have wolf blitzer and kaitlan collins joining us. bill grier is in glasgow. yes, this is a big moment for the planet as we know. this is a very big moment for