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My speech.......
I would like to talk today about how global warming is affecting the lives of polar bears. Other animals do not threaten polar bears, but humans do still-hunt them in Canada. They are mostly threatened as a direct result of how we as humans treat the earth and the environment. If we as humans continue to pollute our world, there is a chance That the polar bear could become extinct in 50 years.  Polar bears have lived in the Artic and northern regions for thousands of years. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">Polar bears roam from Russia to Alaska, from Canada to Greenland. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">It is very difficult to estimate how many polar bears there really are, but scientists think between 20,000 –25,000 <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">Polar bears are on the endangered list because the temperature in the artic regions is rising twice as fast as they are elsewhere in the world. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">This is causing the ice to become thinner and to melt. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif"> The animals that Polar bears hunt are diminishing also, because of the melting ice and also because humans are living now closer to the artic region. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">These animals include seals, penguins, artic foxes and artic rabbits. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">Seals are diminishing because of human’s greed and vanity. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">These artic seals are born with white fur and are clubbed to death before their fur changes to grey –brown. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">Polar bears need a specific habitat to live in, they will no longer be able to exist in the world if there are no ice floes, for them to hunt from and there is less ice around. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">They will have to stay on shore more, which means they will hunt less and have less to eat. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">Already very thin polar bears have been found, and others that have starved to death. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">Polar bears spend most of the summer roaming the artic on large chunks of floating ice. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">They float for miles. They find mates and hunt for seals and fatten themselves up for winter. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">Without this ice, one of the largest bears will not survive. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">Humans burning fossil fuels, such as coal, oil and gas, to power our homes, factories and vehicles, contribute largely to global warming. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">This has become worse since the industrial revolution, which began in the 1700s. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif"> <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">Scientists have made alarming discoveries from taking ice core samples from deep in the snow and ice that cover the artic regions. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">This shows alarming rises in carbon dioxide (co2) levels. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif"> <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">In about 5years or less if we keep doing what we are doing, to our world, the ice might be all gone. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">More than a million square miles of sea ice have disappeared, during the last decade. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">The sea has risen about 1-2mm around the world, over the last year. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">As the sea levels raise all the costal cities will be under water. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif"> <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif"> <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">What does this mean? <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">It means that the earth now has more co2 in the atmosphere. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">The atmosphere is getting thicker and doesn’t allow as much heat from the sun to go back into space. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">The temperature of the earth is rising, because the co2 is holding the heat back. <span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">So to answer the question, is global warming killing the polar bears? <span style="FONT-FAMILY: Georgia, serif"><span style="FONT-FAMILY: Impact, Charcoal, sans-serif"><span style="FONT-FAMILY: Georgia, serif">Yes and we as humans have to begin to do something about it now, to help with their survival. <span style="FONT-FAMILY: Georgia, serif">