climate scientist michael mann speaks with correspondent miles benson. coming up on "earth focus." >> we will have years like this more often than not. and we've had that for the last 5 years. >> and there just aren't enough sandbags to go around. still not enough sandbags to go around. >> i haven't seen a winter like this in a really long time. or even maybe never. >> we've been seeing some severe weather. expect to see more. it's coming. hurricanes, floods, droughts, raging wildfires, snowstorms, and tornadoes. is this purely nature, or are there manmade, therefore controllable, factors at work? a warmer, moister environment can intensify storms, creating heavier precipitation. and this scientists say is why human activities may account, at least in part, for the rise in extreme weather we're experiencing. >> the debate is settled. climate change is a fact. and when our children's children look us in the eye and ask if we did all we could to leave them a safer, more stable world with new sources of energy, i want us to be able to say yes, we did. [appl

climate scientist michael mann is a central figure in that debate. he was one of the scientists behind the development of the controversial hockey stick chart, which showed how temperature in the late twentieth century was exceptionally warm compared to the previous 900 years. this triggered a tax on dr. mann and the science behind his work, all documented in his book "the hockey stick and the climate wars." michael mann, you write that in mid 1990s, scientists were able to begin to connect the dots on climate change. could you elaborate? >> we understood the basic science of the greenhouse effect nearly two centuries ago. joseph fourier, the same guy who discovered the law of heat conduction, understood that there was this greenhouse effect. so we've known for some time that the greenhouse effect exists and that we're increasing it through fossil fuel burning. by the mid 1990s, we had reached a level of formal certainly about that that we had not before reached. we could actually attach a number to it. in the second assessment report of the ipcc pub

is we've got to slow the industrial machine the fossil fuel machine we're we're out of time dr michael mann thanks so much for being with us it's always a pleasure thank you always a pleasure. as the planet continues to warm what can the diversity of nature tell us about keeping global climate change under control answer right after the birth. of. your friend posts a photo from a vacation you can't afford. to different. the boss repeats the same old joke of course you like. your ex-girlfriend still pens tear jerking poetry keep. norris. we post only what really matters at r.t. to your facebook you st. it sounds like. the really old if you. did you know the press is the only industry specifically mentioning the constitution. that's because a free and open press is critical to our democracy recall versus. well i'm. going to go on i'm sorry and on this show rubio a little picture of what's actually going on and we go beyond identifying. rational debate and real discussion critical issues facing america ready to join the movement then welcome to the big city. water back to the big picture i'm t

we've got to slow the industrial machine the fossil fuel emissions were we were out of time dr michael mann thanks so much for being with us it's always a pleasure thank you tom always a pleasure coming out as the planet continues to warm what can the diversity of nature tell us about keeping global climate change area under control answer right after the break. are you like me want your comedy news or some t.v. want your comedy news to be a bare fisted no holds barred fight to the dad. looking through the vampire writing into the next in the corporate lead the billionaire freaks well they're going to rise. that's what you get with my new show projected in night. dramas the chance to be ignoring. stories others refuse to notice. the faces changing the walls lights next. to pictures of today's events. on demand from around the globe. broken. t.v. . i would rather as questions to people in positions of power instead of speaking on their behalf and that's why you can find my show larry king now right here on our t.v. question more. did you know the press is the only industry specifically menti

the person in charge of policy at the fda, the political appointee was michael taylor. mannantos former attorney. the fda was given instruction to promote technology that created a position for him. his policy ignores scientific and census of the agency and then became monsanto lobbyists. now is it true gm owes are dangerous? unfortunately one of the scientists predicted correctly that without required safety studies, the company would not even do the normal study they would do because they are not on the fda list. so very few safety study. enough for environmental medicine to valuate and discover rats and mice fed gm owes had gastrointestinal disorders, immune system problems, organ damage, accelerated aging, reproductive orders and dysfunction up regulation of last row and insulin. they said this information is not casual come of coastal relationship based on scientific criteria and on that basis all or. should prescribed non-gm oh diets. i went to the conference with a video camera and started to interview the doctors. point they have been representing scientists around t

michael brown. it was a much calmer night in ferguson after authorities said they would take a new approach to the clashes between police and protestors. >> erica mannve look at the golden gate bridge. laurie lay right now about 1,500 ft.. to buttress that may lead in the and the low 60s now. >> erica: we will see a bit of a cool down as we head into early next week. >> reporter: to a new crash is to report. on highway 4 traveling through >> mark: team has. so when a driver of the rahway westbound. the to laugh lines are now blocked. traffic is getting by without a major delay. that something to keep in mind that that's your direction. >> reporter: right before mission we have several vehicles involved. if you're born on 101 in north or from the bay bridge is in their silent about. officials had withheld the as protests raged on. missouri's governor has now patrol in charge in ferguson. >> mark:police now saying that the victim in that shooting, michael brown and a friend were suspects in a convenience store robbery on the day of the shooting. >> mark:these are surveilance photos >> mark:according to the fferguson police chief.michael brown and his