http://www.rstreet.org/news-release/r-street-proposes-cat-and-trade-offset-system-for-wind-power/

R Street proposes ‘cat-and-trade’ offset system for wind power

“The MEOW Act would require wind turbine operators every year to show that they have destroyed at least one feline for every three turbines in active operation,” Lehmann said. “This would mitigate the negative wildlife consequences of wind power in a way that should result in no net loss of birds.”

Operators who demonstrate they have exceeded the minimum required feline destructions would also be entitled to offset permits they could sell to others, under a system R Street calls “cat–and-trade.”