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Fellow had with his daughter which is to tell people there's no reason to be afraid when you go in the water of sharks. i mean, obviously, that's where sharks live. we live to re-create there. sooner or later we are going to overlap and come in contact with one another. >> what about the seals? is this a global warming issue? because all mr. life relates to water temperature. what's happening mere. >> marine life generally moves around the ocean relating to water temperature. it almost acts like a physical barrier or a wall. certain fish or marine mammals won't cross through that wall. they ba...

About once a day that the fellow had with his daughter, to tell people there's no reason to be afraid when you go in the water of sharks. obviously, that's where sharks live, we like to recreate there. >> what about the seals, what is happening here? is this a global warming issue because all marine life relates to water temperatures here. >> they move around the ocean relating to water temperature. it acts like a physical barrier or wall, and certain fish or mammals won't move along the wall. they move along what we call fronts, and it's just basically an area of big temperature difference. s...

Twisters left a trail of destruction and way too many deaths. now skies are clear, but that could be about to change. janice dean is live in the fox weather center with the fox cast, janice. >> reporter: so far we are dealing with temperatures that are really, really cold for the folks who are trying to cleanup. in some cases 40 degrees cooler than what they saw on friday before the severe weather outbreak. skies are quiet for the most part, jon. as we get into thursday, though we have a system that will move throughout region and then saturday we could also see the potential for severe weathe...

See the temperature difference here, the colder air mixing with the warmer air so it's right through this region, the upper midwest, as far south as texas that we run the risk for severe weather and severe weather threat for today. this is a tough day to get through particularly this afternoon. i have to advise everyone across the midwest, make sure your noaa weather radio is turned on and ready to hear any advisory coming in. some of the severe weather may be coming in later tonight and you could be asleep. make sure you are prepared and ready just in case. t.j.? >> bonnie we appreciate you a...

Can't get anymore and of course they haven't great for the environment either. so moving on, what about the other 8% of renewable energy? here's how it breaks down when it comes to consumption. 35% hydro power, 24% wood, 20% biofuels, 9% wind, and 6% biomass waste, 5% geothermal and 1% solar. so, moving on, we'll take a look, let's start with the hydro power. that's basically just power generated by moving water. that means water over dams, tides, in and out of the ocean, wave power, ocean thermal. ocean thermal is power pulled from the temperature difference in shallow versus deep water. now ...