There are many, many sites dealing with all aspects of plastic. Here are just a few links to get you started
LITTERATI is leading the initiative to increase litter pick-up and collect data through the use of the computer app, litterati.org. The mission of LITTERATI is to eradicate litter.
The League of Women Voters, a nonpartisan political organization, encourages informed and active participation in government, works to increase understanding of major public policy issues, and influences public policy through education and advocacy.