Mile
Zero

One of the dilemmas for environmentally-conscious Americans is using compact flourescent lightbulbs, or CFLs. They use less power, but contain hazardous mercury. This leads to the fear that CFLs may save energy, but end up poisoning the environment when they finally wear out.

Luckily, it looks like the risk from this mercury source is far smaller than you may have heard. PZ Myers has a post with more information, as well as the details of how conservative pro-industry groups are using this line as part of a wider campaign of global warming denialism.