Money involved in banning DDT?

...It is quite possible that money has a role in the banning of DDT. The formula is so old that even in the 1940s, if was in the public domain - so no manufacturer had a patent on it. Other, newer insecticides were patented and corporate pressure may have had a role. Also, when Ruckelshaus was CEO of Weyerhauser, the environmental movement contributed greatly to their bottom line and he may have felt obligated to return the favor.