Some of them are, unfortunately. Rain and wind currents can bring pollutants into national parks from areas where they are produced. These pollutants include mercury, PCBs and DDT. They have been found in high concentrations in several National Parks in the western Untied States.
Click here to cancel reply.
Sorry,At this time user registration is disabled. We will open registration soon!
Don't have an account? Click Here to Signup
© Copyright GreenAnswers.com LLC