Daily Archives: April 26, 2008

Global Warming: Definitions,Causes,Trends, Effects and Climate Change

Definition of Global Warming: Gradual increase in the earth’s surface temperature. Popular usage definition: Warming caused by human activity. Technical term for this: Anthropogenic global warming. Definition of Greenhouse Gas: A gas, like CO2, which traps the sun’s heat.The debate: … Continue reading

Posted in Global Warming | 7 Comments

Acid rain: One of the most important environmental problems

The term acid rain refers to what scientists call acid deposition.  It is caused by airborne acidic pollutants and has highly destructive results. Scientists first discovered acid rain in 1852, when the English chemist Robert Agnus invented the term.  From … Continue reading

Posted in Environment | 4 Comments

Geological Time Scale

Historical records only go back a few thousand years, and are inadequate to treat most geological processes. To understand the timing of geological processes we need to look at the geological rock record. This includes erosion, mountain building and other … Continue reading

Posted in Archaeology, interior of the Earth, Physical geography | 1 Comment

Coral Reefs are the “Rainforests” of the ocean

Coral Reefs are the “Rainforests” of the ocean. Reefs are ecologically important ecosystems and have a high biodiversity that serves as a storage bank of rich genetic resources. They are a source of food and medicine, and they protect the … Continue reading

Posted in oceans | Tagged , , | 7 Comments