Small things count when they come in large numbers — lead wheel weights used to balance tires are an example. According to the Ecology Center, 70,000 tons of lead per year is used to manufacture these weights, and they are the largest source of unregulated new lead in the environment. These are the issues of activism that interest me. Replacing them with weights made of other materials would be fairly easy and cheap, but most people don’t even know what lead wheel weights are. What’s the path to producing change on this front? My guess is that you try to get them outlawed somewhere, and then try to get that law to spread. Eventually they’ll be banned in enough places that it’s just easier not to use them at all.