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Long term weather changes is a variation in the statistical distribution of climate over periods of time that range from decades to mant millions of years. It can be a change in the average weather or a amendment in the dissemination of weather events around an average . Global Warming may be limited to a one country, or may happen across the complete surface of the earth. It can be caused by habitual, often cyclical temperature patterns such as El-Nino, or come in the form of more odd events such as the Dust Bowl. In recent custom, chiefly in the circumstance of political and religious policy, climate change commonly refers to changes in contemporary climate. It also know as anthropogenic climate change

Factors that can have an effect on climate are climate forcings. These include such processes as variations in solar radiation, alterations in the orbit of the earth around the sun, mountain range building and continental drift, and changes in carbon dioxide and other greenhouse gas levels. There are a variety of climate change feedbacks that can either amplify or diminish the initial forcing. Some parts of the climate system, for example the oceans and ice caps, respond slowly in answer to climate forcing because of their large mass. Therefore, the climate system can take thousands of years or longer to completely react to new external forcings. australian writing about climate change