The power bill came yesterday, which reminded us of how easy it was to switch to green power. If you haven't yet, take a close look at your bill; there's probably a box to check and everything will happen automatically. If not, invest a few minutes of your time and call the power company to see what your options are. It's worth doing even if you've already switched. Here's why. Green power options, packages, and rates change. If you signed up long ago, say for hydroelectric power, there may be an option you feel more comfortable with, such as wind. Will it cost more than you're paying now? Yes, almost definitely. Can you afford it? Probably. And if not, it's the perfect incentive to conserve.