Question 2 from homework web page:Identify the two principal gases that are believed to be the biggest contributors to the current warming trend.
First by far is carbon dioxide. The biggest contributor is burning fossil fuels. We do this in cars (gasoline), planes (aviation fuel), electric power plants (coal, oil, natural gas), and in home furnaces (oil, gas).
The second leading greenhouse gas is methane. It is a distant second. The principal contributor to methane production is belching and flatulent cows.
Question 3 from homework web page: What has been the cause of increasing amounts of each of these gases.
The biggest contributor to carbon dioxide is burning fossil fuels. We do this in cars (gasoline), planes (aviation fuel), electric power plants (coal, oil, natural gas), and in home furnaces (oil, gas).
The principal contributor to methane production is belching and flatulent cows.