How many threatened birds and tortoises would you be willing to sacrifice to build a commercial wind farm, or a utility-scale solar array? It's an oversimplified way to frame things, of course, but it highlights the reality that renewable energy has environmental impacts, too.

This question originally appeared on Quora. Answer by Darshan Shankar, Entrepreneur, Y Combinator Alum Real trees are significantly better for the...

Now that Sandy has torn apart much of the East Coast, what are your local, state, and national officials doing about the environmental impact?

Congestion isn't an environmental problem; it's a driving problem. Traffic jams can actually be environmentally beneficial if they turn subways, buses...

When a company like Nestlé pipes-up about its unfounded environmental credentials with an attempt to address ecological concerns and to self-promote as a green steward, it's "super-greenwashing."