Our world is always changing. Look out your window long enough, and you might see the weather change. Look even longer, and you'll see the seasons change. The Earth's climate is changing, too, but in ways that you can't easily see. The Earth is getting warmer because people are adding heat-trapping gases to the atmosphere, mainly by burning fossil fuels. These gases are called greenhouse gases. Global Warming has several disadvantages for the world to implement an ineffective change. The main reason is that temperature increases. When the average global temperature rises, natural disasters tend to occur frequently and more severe such as drought, wildfire, storm, flood, and erosion of soil. This results in killing people equivalent to a death from severe drought. In addition, the higher sea level as a result of polar ice melt. If the sea level still increases, it will impact the global population because of loss of land and erosion of the coast. The higher sea level also causes damage to the ecology such as loss of mangrove forest and invasion from sea water to freshwater. Natural disasters occurring severely affect human health both directly and indirectly. The climate change will also affect food production process and cause economic and social problems. Therefore the effect of global warming is based upon a responsibility of the world population to share together.