this year, we had maria and harvey, and yes, the expert s are saying that the storms are getting more intense faster, because of what we are doing here on earth. cnn's nickserious warning from the world's climate experts. >> reporter: deadly wildfires from california to greece, and that record-setting rain just dumped by hurricane florence on the carolinas, droughts, crippling cape town, south africa, and heat turning europe brown, and now we have only 12 years to stop all of this to getting much worse. average temperatures have risen about 1 degree celsius, and in paris, they are pledging to keep the temperature below 2 degree, and now we are saying that we aim at 1.5 which is a benchmark that we with are predicted to reach by 2030 >> the message is that countrieses need to cooperate. >> reporter: and yet president trump is trying to revive the polluting coal industry here in the u.s., and also pledged to withdraw from the historic paris climate change agreement and roll back the obama era targets for cutting the emissions. >> they benefit a tiny group of the fossil fuels at the expense of the american people. >> reporter: and the presidential front run