Global Warming

                      I agree that global warming is a real threat to the biosphere. There are plenty of reasons why i feel this way, one reason why i feel this way is because polar bears are losing their habitat because of the ice sheets melting, it is harder for the polar bears to get their food because the the seals are farther out in the ocean now. The water levels are rising too and this is also bad for the polar bears because there will be more water in the ocean which is a possibility that the polar bears may drown. Another reason why is that the greenhouse gases are causing our earth to be warmer than usual. When our ozone layer gets to thin from all the greenhouse gases, more infrared radiation gets trapped inside the earth which heats it up more and this can be a real threat to human beings. These greenhouse gases are also a cause of ice sheets melting quicker than usual. The Arctic gets more of the infrared radiation that gets trapped inside the earth and this causes the ice in the Arctic to melt quicker than it is expected to. All these reasons tie in together, the greenhouse gases causes infrared radiation to melt the ice in the Arctic faster which will not be good for the polar bears and they may go extinct. Human beings are also a reason why we have so much greenhouse gases. We need the greenhouse gases to sustain human life, but human beings determine how much greenhouse gases we find in the atmosphere by all the human related activities we are doing. Once there is to much greenhouse gases in the atmosphere, then this is the concern because that can be a real threat to humans. Acid precipitation is also formed when water vapour and nitrous oxide mix together in the atmosphere from humans putting to much of these gases in the atmosphere. Acid precipitation is another threat, when acid precipitation is formed and descends to earth, it can harm plant and animal life.