Plants and animals will find it difficult to escape from or adjust to the impact of global warming. Scientists have observed a change in the life cycles of many plants and animals, such as birds and flowers blooming earlier than the spring bloom early. Many species have begun to move where they live or the form of their annual migration is due to warmer temperatures. With further warming, animals tend to migrate toward the poles and up the ridge toward higher ground. Trees will also try to change the scope of Thar, identify new areas as old habitats overheating. In many places, however, the development of human will prevent the change. These species were either farmland city block north or south could become extinct. Species] en unique ecosystems, such as those found in polar and mountaintop.regions, particularly dangerous for migration to new habitats is impossible. For example, polar bears and marine mammals in the Arctic is being threatened by a decline in sea ice, but no place further to the north to go. Provision extinct spedes by global warming is extremely difficult. Some scientists have estimated that 20 to 50 .percent.of species could be committed to extinction with 2-3 degrees C of warming even further. Speed warming, not only the magnitude, is extremely important for flora and fauna. Some ocean temperatures can cause corals to "bleach", a condition which, if prolonged will lead to death of the coral. Scientists estimate that even 1 degree Celsius of additional warming can lead to common bleaching and death of coral reefs in the world. In addition, increasing carbon dioxide in the atmosphere, oceans and increase the acidity of sea water. This acidification continues to emphasize the marine ecosystem.
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