Chris.+K

= Describe how climate can be influenced by human activities =

__** Greenhouse gases **__



• On a yearly basis, the human population gives off over 30 billion tons of carbon dioxide (CO2) • A large majority of this CO2 is from fossil fuels • CO2 concentration increased 30% from 1870 - 1995 • * • *

__** Depletion of the ozone **__

• Nitrogen oxide from planes in the stratosphere can contribute to ozone depletion • Chlorofluorocarbons (CFCs) from things such as aerosol sprays also contribute • CFC's are very thermodynamic and are commonly used to insulate appliances such as refrigerators. • * • *

__** Bibliography **__

• http://planetsave.com/2010/08/18/humans-cause-global-warming-10-indicators/ • http://www.ecn.ac.uk/Education/climate_change.htm • http://www.tutorvista.com/chemistry/human-causes-of-ozone-depletion • http://www.ciesin.org/TG/OZ/cfcozn.html