change we really need to make according to mr kerry today, we'd have to open up a solar power plant big enough, the biggest one in the world right now, every single day between now and 2030 just to switch our energy into the safe space where we could keep temperatures before 1.5. so, that is a massive monumental challenge and time is of the essence and mr kerry was very keen to make that point. matt mcgrath. with more on what lies behind the extreme weather around the globe, here's kim cobb, a climate scientist at the georgia institute of technology. well, it really all comes back down to heat. and the greenhouse gases that are accumulating in the atmosphere are warming the planet and we see this very clearly in the data. this warming has a number of dramatic effects on the climate system. obviously most notably it causes the kind of record—breaking heat