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The same proof that it is-none. We will know in about 500 years
polar bears fur is water proof because it helps keep them warmer in the water
They release gases into the atmosphere that destroys the ozone layer (which protect us from the direct sun rays) and causes global warming.
Nothing as it is a myth that it is man made. No proof whatsoever, just computer models that are manipulated.
the melting of polar ice caps is one proof that the world temperature is indeed increasing.
There is scientific proof that global warming is happening in the world in 2014. One factor is the burning of fossil fuels (coal, oil and natural gas) in industry, transport and the generation of electricity, which releases carbon dioxide (CO2). Another is deforestation.
Global warming has been disproved. The natural increase or decrease of supposed 'greenhouse gases' makes the human change negligible, and there is no proof to support that greenhouse gas' is a legitimate term, as they may be relatively harmless.
Some people will say anything, whether it is good for you or not. Ask around, sports coaches etc and take a consensus view. I think most people advise some degree of 'warming down'.
mars north polar cap is sposed to have water on it geographical features simalar to ones on earth leading to further proof that Mars has or had water on it
Most hunting has been halted, and people are storing refuse in bear proof containers, to prevent them from becoming dependent on humans for food.
A contemporary example of an issue where scientist stand on one side and different groups stand in opposition is global warming. Many people claim that global warming does not even exist but most scientist have proof that it does exist.
Yes, they do. They like pretty much any type of animal they can kill and eat, but I think their favorite is seals. However, sometimes there is interaction that is not predatory between polar bears and wolves in the wild, and also domesticated dogs at times. See the dogs and polar bears playing in the videos linked below in the related links section for proof of this little understood phenomenon.