Here's the best source I have found for back-of-the-envelope calculations for energy use: http://www.withouthotair.com/c20/page_121.shtml http://www.withouthota

Here's the best source I have found for back-of-the-envelope calculations for energy use: http://www.withouthotair.com/c20/page_121.shtml http://www.withouthotair.com/c20/page_121.shtml Calculating emissions from energy depends on the local mix of power plants.