Yeah I bet you think the stone age was very eco-friendly. Where do you think you find these "toxins" that we are putting "back into the enviroment"? FROM the enviroment. That mercury, guess what. IT CAME FROM SOMEWHERE. SOMEWHERE IN EARTH's ENVIROMENT. I hope you use that time machine that the guy just built to make a permanent visit to the stone age. Your concerned about emissions from a LAWNMOWER? Is this article serious? FROM A LAWNMOWER!!!!!! EMISSIONS FROM A LAWNMOWER? WAKE UP. Official member of the anti church of envirolunacy of global warming and official member of the "the sun has more do do with changing the weather then us... uh hello" Have you ever seen "the great global warming swindle?" I know you see it every day but see the online video.
Stay up to date on the latest news of the future of science and technology from your iPhone with full articles, images and offline viewing
Featuring every article from the magazine and website, plus links from around the Web. Also see our PopSci DIY feed
Share links with friends, comment on stories and more
In our December issue, Popular Science names the 100 best innovations of the year: bombproof wallpaper, self-parking cars, the fastest helicopter, and 97 more. Plus inventor profiles and videos.
Check out the best of what's new here.