Global Warming or Climate Change is the measurable increase in the average temperature of the Earth's atmosphere, oceans, and land masses. What causes Global Warming by the way?
Sunlight brings brings energy to the Earth. This light turns to heat when it hits the ground. The heat in turn seeps away from the Earth, but the atmosphere which is a layer of air around the planet that holds in some of the warmth slows the heat's escape. The atmosphere is a mixture of many gases. Well, base on my research, in the last 250 years, this mixture has been changing. Thus, the amounts of gases such as methane and carbon dioxide have been rising. It trap heat more effectively than any other gases. They make the Earth's atmosphere act like the glass in a greenhouse. It lets sunlight in, yet it doesn't let heat out. What's the effect? As a result, heat is building up close to the surface.
In other words, people are changing the atmosphere. We are the one who causes the big change. The changes started when people began cutting down forests and burning the wood without replacing. The inventions of automobiles and other machines too which greatly increased the amount of greenhouse gases released into the atmosphere, thus, It'll make the atmosphere more complicated.
Global Warming is indeed very dangerous. It can even melt the ice at the poles. Well, we must make a move to stopped the global warming. If we cut down trees, we must replace it urgently. Vast new forests must be planted. Just think about what will be the next generation look like. Just think about our future.
Credits: Encarta Encyclopedia