Sunday, July 20, 2008
Tuesday, July 15, 2008
what is deforestation? SERIOUS topic, pls concern!
Deforestation is the conversion of forested areas to non-forest land for use such as arable land, pasure, urban use, logged area, or wasteland.
Generally, the removal or destruction of significant areas of forest cover has resulted in a degraded environment with reduced biodiversity.
In many countries, massive deforestation is ongoing and is shaping climate and geography.
Deforestation results from removal of trees without sufficient reforestation, and results in declines in habitat and biodiversity, wood for fuel and industrial use, and quality of life.
what is global warming?
Global warming is the increase in the average measured temperature of the Earth's near-surface air and oceans since the mid-twentieth century, and its projected continuation.
Increasing global temperature is expected to cause sea level to rise, an increase in the intensity of extreme weather events, and significant changes to the amount and pattern of precipitation.
Other expected effects of global warming include changes in agricultural yields, modifications of trade routes, glacier retreat, species extinctions and increases in the ranges of disease vectors.
Remaining scientific uncertainties include the amount of warming expected in the future, and how warming and related changes will vary from region to region around the globe.
Monday, July 7, 2008
Subscribe to:
Posts (Atom)