Re: 70's electricty
The problem with turbines+bats is that no-one really has a good handle on the flight paths that bats are using. It's very easy to site turbines in the wrong place.
Next problem is that ground scavengers quickly remove carcases.
Next problem is that wind farm operators are reluctant to allow large scale studies of the problem.
Next problem is denial that there's a problem, any problem, with wind turbines.
But you can see the turbine companies think there's a problem because of the different things they're experimenting with to make turbine blades more obvious to stuff that flies. I'm assuming they wouldn't be spending this money if there wasn't a problem to fix...
Cats. Yup, wouldn't argue that belling is the best solution. But, ironically, it's probably going to be easier to sort out the turbine issues than to get a majority of cats owners to care one bit about what their cat is doing when it's out and about...