Usually, the main cause of climate change is the " greenhouse effect" which warm the earth's surface as a result of atmospheric pollution by gases, the particular greenhouse gasses such as carbon dioxide, water vapor, methane, ozone , and chlorofluorocarbon that heat from earth's surface is absorbed by atmospheric greenhouse gases that produces this difference between the definite surface temperature and the effective temperature is due to the atmosphere. the increased amount of gasses that absorbed heat is advance to had more heat being retained in the atmosphere and can increase the global average surface temperature,not only greenhouse effect that cause climate change the human aspects can also change earth's climate, human activities such as burning fossil fuels and deforestation, and it can be one causing global warming.
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The high islands of the Pacific were formed by seismic activity whereas the low islands of the Pacific were formed by coral growth. Continental islands and oceanic islands were formed by volcanic activity.
High islands often have fertile soils and lush rainforests. In contrast, low islands are often less fertile than high islands. Some low islands lack freshwater sources.
