Just because species have not been negatively affected in the past (to your knowledge) doesn't mean they won't be in the future. Imagine if a new set of power lines were installed across the migration paths of some large herbivores - they might affect their migration, and so the health of the groups affected. That means their normal predators (whose numbers have grown large enough to be sustained by that group of herbivores) are now without enough food. They might just start attacking humans. That's pretty extreme, but it's an example of a much worse secondary effect of what otherwise seems like a rather benign primary effect.
No-one's calling this the "next global warming", and you might want to leave your Al Gore bashing out of this so you don't look quite so ridiculous.