global warming !!!

What Causes Global Warming?

The greenhouse effect: puncturing the ozone layer, this layer are effective in preventing UV projection down to earth, the ozone loss region is desert land, no work to reduce daytime temperatures to rise night temperatures of the day was very hot, very cold at night
- The process of industrialization, modernization generates a variety of types of jet emissions, waste directly into the environment, dust billions of vehicles using fossil fuels such as gasoline, these wastes most of the CO2, if the atmosphere is too much gas, when the sun shines on trapped heat will increase the temperature of the earth's surface. According to natural gas, the CO2 will be re-tree photosynthesis to produce oxygen, but because of deforestation should be fully and not enough trees to CO2 resolution
- Forest destroyed all that sun has no reference to the earth's green-canopied trees to block the direct reference to the ground, forming the dry areas, such as the desert heat. The rainy season does not hold water forest should happen to flood the dry season, drought should end nc.
- Forest fires, volcanic eruptions also produce a large volume of CO2
- All causes of increased temperature on the surface of the earth to do with the two poles melts, exposing permanent CO2 ice, and it will enter the circulation of CO2 on Earth so on earth and the temperature increased.
- Until now, people no longer able to overcome. If you cut off all the CO2 on earth are going we can not overcome its consequences DC. And by now just about 100nam the earth temperature increases 2do
In short: the earth temperature rises, the main reason is because the amount of CO2 in the earth's surface is increasing.

Some impacts from increasing temperatures are already happening.

• Ice is melting worldwide, especially at the Earth’s poles. This includes mountain glaciers, ice sheets covering West Antarctica and Greenland, and Arctic sea ice.
• Sea level rise became faster over the last century.
• Some butterflies, foxes, and alpine plants have moved farther north or to higher, cooler areas.
• Precipitation (rain and snowfall) has increased across the globe, on average.
• Spruce bark beetles have boomed in Alaska thanks to 20 years of warm summers.

Floods

what is floods ?

Flood is a form of natural disaster. It is an overflow of an expanse of water that submerges land.The EU floods directive defines a flood as a temporary covering by water of land not normally covered by water. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Flooding may result from the volume of water within a body of water, such as a river or lake, which overflows or breaks levees, with the result that some of the water escapes its usual boundaries.While the size of a lake or other body of water will vary with seasonal changes in precipitation and snow melt, it is not a significant flood unless such escapes of water endanger land areas used by man like a village, city or other inhabited area.Floods can also occur in rivers, when flow exceeds the capacity of the river channel, particularly at bends or meanders

Impacts of floods

As the other natural disaster, floods also impacts on the environment and society. Floods destroy drainage systems in cities, causing raw sewage to spill out into bodies of water. In the heavy flood, the house also can be destroy very easy. This can lead to catastrophic effects on the environment as many toxic materials such as paint, pesticide and gasoline can be released into the rivers, lakes, bays, and ocean, killing maritime life. Floods may also cause millions of dollars worth of damage to a city, both evicting people from their homes and ruining businesses. Floods cause significant amounts of erosion to coasts, leading to more frequent flooding if not repaired.

However, floods also have a slight positive impact on the environment.It spread sediment containing beneficial nutrients to topsoil that might never occur if do have floods.

Vietnam Floods

From 1/10/2010 to 20/10/2010 there are two large floods come to all of the provinces in middle area of Vietnam .Following the data at that time , in the first floods, there are about 66 people dead, 18 people lost , the damage about 2 750 billion. In the second floods, there are about 35 people dead, 21 people lost. All in all, there are more than 169 000 houses were destroy.

receiving the data that the floods will come, the government also try to move people in the most dangerous area to another places.However, still have many people left , the rain still did not stop, every where in Ha Tinh (the name of the area ) no foods, no places to live. Everyone must be squeezed to exhaustion to withstand floods for centuries, all of this flood to flood other. Many houses were swept away and people back to nothing. They are hungry and have to find the food to maintain their breath difficultly.

This is the video below will show us more about that real situation.

Vietnam's largest floods (10/2010)