''If you want to see how invasive a wind farm can be, just take a ride in Schuylkill County,'' he wrote. ''A ridge that stretches from Mahanoy City to Centralia, an area of the best hunting and passive recreational woods in that part of the county, has been ruined with these monstrosities.'' I had not visited that area for years, and the worst environmental damage I recalled was from anthracite mining. That, however, had a legitimate purpose; wind turbines are a scam that serves only to enrich those who peddle and build them.