Global WarmingPlants absorb CO2 better than models predicted - ABC AM Simon Santow reported this story on Tuesday, October 14, 2014.
Arctic Ice Shrinks as Antarctic Ice Expands - ABC AM Simon Santow reported this story on Wednesday, October 8, 2014. Global warming is the term we use for the gradual increase in the average temperature at the Earth’s surface that has occurred over the past century or so.
|
What is the cause of this gradual temperature rise?
Scientific modelling by atmospheric scientists and meteorologists, using data they have collected from ice core studies and measurements of atmospheric temperatures and gas concentrations in the atmosphere, indicates that the increase in concentration of the greenhouse gases in the atmosphere above their natural levels is the prime cause of global warming. Greenhouse gases include carbon dioxide and water vapour. A number of other gases in the atmosphere also act as greenhouse gases, although the percentage of them in the lower atmosphere is much less than that of carbon dioxide and water. These gases include methane and nitrous oxide. |