to risto the cllenges of clime changethey musdo snow. thiis not aroblem for anher day.he invesents we're mang todayill dermine o economifuture. >> according to the u.s. government's 2014 national climate assessment, average temperatures have increased by as much as 1.9 degrees fahrenheit in the u.s. since 1895, with most of the increase occurring since 1970. temperatures are projected to rise another 2 to 4 degrees in most areas of the country in the next few decades. people are already feeling the impact, these early effects of climate change a harbinger of what the future may hold. >> if you're on the coast, most likely it's sea level rise. if you're in the midwest, extreme heat-wave events. extreme flooding and precipitation in the midwest. the heaviest rain events are getting 30% heavier. the folks in the rocky mountain west, they're not gonna recognize the forest even 60 years hence. we're losing most of the pine trees in the southern part of the rocky mountain forests in future projections 'cause it's getting too hot and too dry. >