What is global warming?

Global warming is a gradual increase in the global temperature of the Earth which is caused by the increased of greenhouse gases in the air. These greenhouse gases are carbon dioxide, CFCs, oxides of nitrogen and other pollutants. Natural events such as volcanoes erupting and human activities such as agricultural activities are believed to be contributing to the increased in greenhouse gases.

Why is global warming important?

Global warming is an important topic to most of us and need to be addressed urgently because it is affecting our daily life and also posing threats to our health. Poor people are greatly affected as some of them depend on the climate for survival. Consequences of rising Earth’s temperature include increased in sea surface temperature, melting of ice caps, rising of sea level, drought,  heatwave and unpredictable climate changes.

Source: http://www.globalissues.org/article/233/climate-change-and-global-warming-introduction