Climate change is any long-term significant change in the “average weather” that a given region experiences. Average weather may include average temperature, precipitation and wind patterns. It involves changes in the variability or average state of the atmosphere over durations ranging from decades to millions of years. These changes can be caused by dynamic processes on Earth, external forces including variations in sunlight intensity, and more recently by human activities. Its an evidence, the Global warming or the increase in the average measured temperature of the Earth's near-surface air and oceans since the mid-20th century, and its projected continuation.

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climaticchangeglobalwarmingecologynatureweather