Greenhouse gases- methane(CH4), CFC's, carbon dioxide, Nitrous oxide(NOX, N2O)
Most data indicate that the mean global annual temperature has increased by .5 degrees C
In the models of global warming, the most important factor contributing to an increase in sea level is the thermal expansion of the oceans
Effects of global warming are:
loss of fertile delta regions for agriculture
change in global patterns of precipitation
extinction of some species that have narrow temperature requirements
increased frequencies of hurricanes
Location where the greatest number of people would be directly affected by global warming-coastlines, esp. under sea level and small islands.
Greenhouse gases include carbon dioxide, methane, ozone, nitrous oxides, CFC's
The greenhouse effect- infrared radiation from the earth's surface is absorbed by gases in the atmosphere.
(1974)- requires minimum safety standards for every community water supply.. Contaminants regulated are bacteria, nitrates, arsenic, barium, cadmium, chromium, fluoride, lead, mercury, silver, pesticides