By Hank Green

We love Popular Science. We like to think of ourselves as a pale imitation of PopSci with a green slant.
So when the real Popular Science starts covering green technology, that matters to us. Which is why it rocks that PopSci's recent list of 2007's most important innovations has a whole section for green technology.
Unsurprisingly, we've covered the majority of the honorees.
Those include:
We only skipped the ice-based air conditioner and GE's ultra-efficient locomotive.
Now ... are we upset that PopSci hasn't offered to buy us? No.
Are we bragging about our ability to cover the coolest stuff that is happening in the world today? Yes ... yes, we absolutely are.
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A strong economy would help the clean tech revolution get a foothold. And a weak economy will hurt it.
Hummers do not beat Priuses in eco-friendliness over their lifetime, and other urban legends debunked.
If all the roofs in the world were white, according to a new study, the effects of global warming would be significantly reduced.
Old pantyhose can become everything from a bungee cord to a scrubber to a paint filter.
Next time you're weighing your options, consult GoodGuide, a source for free, scientist-verified data on more than 60,000 products.
Use this interactive map to find people giving away free stuff, or who will take yours off your hands.