I'm not quite sure what you're looking for. Trying
www.google.com may help you find what you're looking for as well. (Trying Hybrids greenhouse gases study, for example)
If you're looking for info that the HV batteries aren't toxic, I'm not sure how much straighter from the horses mouth you can get than the battery engineer at Ford, who stated it to me at the Ford Escape Hybrid Experience in Dearborn last summer.
If you're looking for information on the greenhouse gases, and the emissions, the USA EPA websites have some good information there about them.
www.epa.gov ,
www.fueleconomy.gov