> It is therefore rather "symbolic politics" with politicians trying to get a "greener image" on this issue, rather than actually fixing the environment. I'd b

> It is therefore rather "symbolic politics" with politicians trying to get a "greener image" on this issue, rather than actually fixing the environment. I'd be surprised if this is actually the case. I haven't looked up the actual regulations/laws that control TSP, but I would guess that it's done through the EPA as executive regulations, rather than specific provisions in law. In that case, it seems unlikely to me that the political pressure on the President would significantly affect the EPA's findings on all but the most economically significant pollutants.