Environmental Issues

Here's a website which tells about global environmental issues:
http://www.globalissues.org/

I went into the web page Climate Change and Global Warming and Environmental Issues, and I looked through some of their articles.

The global warming is the average of the temperature of the Earth increases. This is caused by human activities and some natural events. People are raising the quantities of greenhouse gases like Carbon Dioxide (CO2) , methane (CH4) and water vapor (H2O).

The greenhouse effect is the energy from the Sun heat the surface of the Earth. At the same time, Earth also radiates energy back into the space. However, some atmospheric gases trap the radiating energy from Earth, and the gases calls greenhouse gases. The greenhouse effect is the advance of the temperature of the Earth.

The main greenhouse gases are carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O). Moreover, there are three other fluorinated industrial gases: hydrofluorocarbons (HFCs), perfluorocarbons (PFCs) and sulphur hexafluoride (SF6). Furthermore, water vapor is also a kind of greenhouse gas. In the greenhouse gases, methane is the most inflential one, which is 20 times as potent as CO2.

Actually, the greenhouse effect is necessary for the living things on the Earth, Earth would be a lot colder and organisms couldn't live on it if we don't have them. Nevertheless, if the greenhouse gases were too much, the heat from the Sun couldn't go back to the space, the Earth would also be unlivable. Even though CO2 isn't the most potent greenhouse gas, it is the momentous one of them. Humans have caused a imbalance of nature carbon cycle. We increase the amount of CO2 by fossil fuel burning and deforestation etc. People transfer carbon dioxide from biomass (the total quantity or weight of animals and plants in a particular area or volume) to atmosphere. Because of this, the quantity of CO2 on the Earth is a lot higher than before. There is a picture shows the transferals of CO2. We can see the quantities of deforestation and manufacturing are the main causes CO2.

Image source: NASA.(Note, values shown represent Carbon Gigatons being absorbed and released)

The differences of varied organisms on the Earth are their diversity, and the biological diversity calls "biodiversity". The different ecosystems are all a part of biologically diverse Earth. The protection and limited development are very important for the nature. People notice the importance of nature envirment, they need to maintain the biodiversity. However, power, greed and politics have affected the precarious balance.

"At least 40 per cent of the world's economy and 80 per cent of the needs of the poor are derived from biological resources." If the nature is more diversity, the medical science and the economy can be better. Furthermore, the climate won't be aggravated, and people can't live on the Earth.The biodiversity is relative to climate changes. The rapid global warming can affect an ecosystems chances to adapt naturally. This emphasize the importance of protecting and lowering the destruction to nature.