From the July/August 2007 issue of AAA NY Car and Travel: In a study conducted by the Union of Concerned Scientists (UCS), Honda, Toyota and Nissan are 1-2 and 3 in terms of reducing smog-forming pollutants and greenhouse gases. They are using environmental technology in all their vehicles while the losers are installing it piecemeal or not at all. The study analyzed 10 vehicle classes produced by 8 automakers. Daimler Chrysler came in last. Being a Honda owner, the study results are reassuring.