The accurate tally of the sources of greenhouse gasses (GHG), which are driving our public policy formulations and hence all legislation, is critical. The chart above, and the link from it, is to the Edgar Emission Database for Global Atmospheric Research. It's pretty clear that the vast majority of it is from industry, business and power production. A large chunk of it is from residential development and consumption. The vehicular emissions are not a big part of the total picture, so a serious reduction in coal power plants and oil consumption in industry, manufacturing and agriculture is critical to getting the global carbon number down to 350.
The site has some database files and analysis that can be downloaded to examine the specific numbers.