The biggest problem with DDT was it was used too liberally, we sprayed it everywhere with no thought about how much was used. Like any chemical, it should only be used in the minimal amount necessary to complete the job. The newer chemicals may degrade faster but they still degrade to "something" and we are not sure what the long term effects of that degraded compound is. When it does degrade to something that won't kill bugs we spray on more. That may be great job security for chemical manufacturers but I am not sure if it is that great to the environment.
