Global warming is an increase in average temperatures throughout the Earth's surface in the atmosphere, the sea and the land of the earth. An increase in the temperature of the earth began to occur since the early 20th century caused by the increase of greenhouse gas substances as impact of human activity. an increase in the surface temperature of the earth can cause sea level rise, extreme weather changes, changes in the number and pattern of precipitation.
The most visible impacts of global warming are poor agricultural yields, polar glaciers disappearing and some species are extinct. Global warming has begun to become a serious world problem so that countries in the world begin to regulate the use of greenhouse gas emissions. This is evidenced by the signing of the Kyoto protocol to reduce greenhouse gas emissions.
The causes of global warming are numerous and complex and may increase in proportion to the development of human activities and needs. some activities that are important to do everyday unconsciously can also be a cause of global warming ranging from activities at home, environment, nature and even policies in government can be a cause of global warming.
Lots of ways that we can do to reduce the effects of global warming so as not to get worse and make our earth is destroyed slowly and the solution are  plant trees, reduce paper usage, reduce ride own, vehicle, reduce the use of plastic, and save electricity. Maybe we cannot stop the global warming, but we can reduce the impact that will have came if we do not do anything for help our earth
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