The Environment Essay Research Paper — страница 3
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much of it would affect the global, raise sea levels, and threaten water supplies. They also stated that the land and water left revealed by the retaining ice would themselves retain heat, creating a feedback loop that would speed up the warming process. The institute pronounced that the world’s glaciers, taken as a whole, are now shrinking faster than they are growing. Worldwatch also warns of the outcomes of retaining ice on wildlife. In northern Canada reports of hunger and weight loss among polar bears have been associated with ice cover changes. And in Antarctica, sea loss, rising air temperatures and increased condensation are altering the habitats and the feeding and breeding patterns of seals and penguins. Cornell University ecologists believe that global warming may account for millions of human deaths from disease. David Pimentel a professor of ecology at Cornell stated and assumes that “Most of the increase in disease is due to numerous environmental factors, including infectious microbes, pollution by chemicals and biological wastes and shortages of food and nutrients. Global warming will only make matters worse.” Global warming will produce a favorable climate for disease producing organisms and plant pests. Global climate change will result in a net loss of obtainable food, for example the decline in rainfall (due to global warming) causes crop and plant production to die out. Infectious disease and environmental factors are to blame for more than 75% of all deaths in the world. Environmental disease may comprise of organic and chemical pollutants, including smoke from tabacco and wood sources. More than three billion people are malnourished. Malnutrition increases vulnerability to pollution-related illnesses and diseases such as diarrhea. Therefore Pimental concluded, “we’re seeing the first signs that global climate change can influence the incidences of human disease”. And that “this change combined with population growth and environmental degradation, will probably intensify world malnutrition and increases in other diseases as well.” Melting is taking on vast and unprecedented level in the Arctic sea ice, the Antarctic and in dozens of mountain and sub-polar glaciers, and the rate has accelerated immensely in the past decade. The Earth’s ice cover could have intense changes on the global climate and rising sea levels could start regional flooding. Melting of mountain glaciers could also endanger urban water supplies and the habitats of plant and animal species in fragile environments. Within the next 35 years, the Himalayan glacial area is expected to shrink by one-fifth, to just 100, 000 kilometres. A prediction forecasts that the remaining glaciers could disappear in 30 years. The melting has been especially noticeable in the past three decades, and scientists believe that it is the result of human behaviour and the build up of carbon dioxide and other greenhouse gases that contribute to global warming. All current examples of global warming are significant due to the effects that it has on the environment and people. For people, it can cause infectious diseases and pollution-related illnesses that in turn effect our standard of living. Some examples can be more significant than others. For example diseases amongst people is more so important than the rise in sea levels and melting of glaciers since peoples existence are endangered.