Are+humans+responsible?


 * Talk about the evidence for and against the argument that humans have caused global change?

The Earth has warmed by about 0.74 ± 0.18 °**[|**C**] over the past 100 years, scientists are not exactly sure how. The earth could be getting warmer on its own, but many leading climate scientists are now think that things people do are helping the earth getting warmer. They also know that Greenhouse gases makes the Earth warmer by trapping energy in the Atmosphere.

Some scientists actually say that global warming and the effect of humans on the atmosphere is required to avoid or delay the next ice age, and the global warming that is currently going on is a positive thing.

one major greenhouse gas reservior is the cattle farming industry, which both clears land for the farms them selves (destroying the carbon storage ability of trees) and producing huge amounts of methane gas from the cattle. Methane gas has a far higher heat trapping capacity than CO2.
 * What human activities can contribute to Global Warming?**
 * Industrial Revolution
 * Fossil Fuels
 * Automobiles
 * Power plants

Some effects on both the natural environment and human are, at least in part, already being attributed to global warming. A 2001 report by the IPCC suggests that glacier retreat, ice shelf disruption, sea level rise, changes in rainfall patterns, and increased intensity and frequency of extreme weather events are attributable in part to global warming. Other expected effects include water scarcity in some regions and increased precipitation in others, changes in mountain snowpack, and adverse health effects from warmer temperatures. Social and economic effects of global warming may be exacerbated by growing population densities in affected areas. Temperate regions are projected to experience some benefits, such as fewer cold-related deaths.