Wednesday, March 25, 2009

Wednesday, March 11, 2009

An Inconvenient Truth


An Inconvenient Truth is a documentary film about global warming presented by United states vice president Al Gore in 2006. Al Gore starts his show by showing some pictures of our planet, and he mentioned that the first picture taken was in 1962; it was not accurate but in 1972 the most common picture was taken. Some people think that whatever people did in this planet it will never have an impact on it because the earth is so big ; but Al Gore shows the audience some statistics and graphs which show how people around the world in each continent affect the earth. In one of the most important parts in the movie Al Gore shows some beautiful natural places but nowadays they have gone because of global warming; also some of the biggest cities in the world will be covered by sea water in future, for example Calcutta in India, Beijing in China and the world trade center in Manhattan in New York city. Finally people around the world are concerned only about wars and terrorism ; they should care about our planet and keep it safe.

Monday, March 2, 2009

Introduction to the Global Warming



Global warming is the increase of the average temperature ; it is known as the greenhouse effect. Some of the gases in the atmosphere act like a glass surrounding the earth and the emissions act on it and allow the sunlight to come through to heat the earth's surface and also as the greenhouse gases trap or build up in the atmosphere the temperature increases and the earth gets hotter. One of the main greenhouse gases is carbon dioxide (CO2); this gas contributes 50% of the greenhouse effect. Cars are one of the major sources of CO2; the rest comes from burning coal, oil and other fossil fuels. All the charts and the graphs show that the temperature is increasing ; from 2000 to 2007 the line of the graph increases sharply. People nowadays try to slow down the warming as much as possible. Using nuclear power that does not produce CO2 , clean and efficient transportation situation and use of alternative energy such as wave and wind energy are ways of improving the situation.