Simple but nourishing: The average American wastes more than 1/2 lb. of food each day. Meanwhile, millions of people are going hungry in our own cities. Here are a few ways to cut down on your food waste.

Revolving doors are ubiquitous in our cities. Why not use them to generate free energy? The Revolution Door by Fluxxlab would do just that. It converts the kinetic energy used to push the door into electricity. Several similar projects are in operation worldwide. Now we're not just spinning our wheels. Producer: Eve Marson Editor: Jeff Conrad

The ability to locate a shooting quickly can help police catch bad guys and save lives. In Richmond, California, acoustic gunfire detection is doing just that. With acoustic sensors distributed around the city, dispatchers can use the sound of gunfire to pinpoint where a shooting happened, the number of shots fired, and even the kind of gun that was used.

Buildings are actually responsible for more greenhouse gas emissions than cars. But simply weatherizing houses and businesses can reduce their environmental impact and lower energy bills. That's why organizations such as the Community Environmental Center in New York are providing subsidized weatherstripping and insulation to homeowners—and creating new "green jobs" in the process. Everyone wins.

Thirsty? So is everyone else. We're headed for a water shortage. Here's how simple daily choices can reduce your water use. A GOOD Transparency video. Direction and Design by Fogelson-Lubliner Music by Dim Dim (less info)

Exercise and sleep. We need them both, but it's hard to find the time. What if we could just go for a jog and get a nap at the same time? A GOOD Inventions video.

Some truly terrible people end up getting treated really well just because they are, quote-unquote, attractive. It's unfair, and linguist John McWhorter's new love drug would fix that situation. A GOOD Inventions video. Directed by Max Joseph Animation by David Lamps Music by: Alan Wilkis: http://www.myspace.com/alanwilkis Ben Benjamin: http://ghostly.com/artists/ben-benjamin Javelin: http://www.myspace.com/hotjamzofjavelin

www.good.is/shows/inventions For our Inventions series, Nick Kroll wants to create the KtD 3000, a modified Toyota Tercel that can turn cats into dogs. Why? Put it this way: When was the last time you saw a cat help a blind person? He'd even do it for free. What's your invention? Animation by Chris Weller Directed by Max Joseph Produced by Eve Marson Edited by Simon Hawkins Music by The Deadly Syndrom, Midwest Product, Yacht, Alan Wilkis

www.good.is/shows/inventions Do you ever get the feeling that some world leaders and captains of industry are simply suffering from an empathy deficit? Majora Carter, the environmental justice advocate and founder of Sustainable South Bronx, wants to invent a virus that infects people with love—an infectious, “low-grade ecstasy.” Sounds like an affliction we could use. What's your invention? Animation by David Lamps Directed by Max Joseph Produced by Eve Marson Edited by Simon Hawkins Music by Alan Wilkis

www.good.is/ecosystem Hybrid cars are great, but they're often delivered on cargo ships and trucks that use the same old fossil fuels. We need to find better kinds of bulk transportation. The Auriga Leader is showing the way. Produced by Eve Marson and Max Joseph

www.good.is/shows/inventions On tour with her band Morningwood, Chantal Claret often has to find dinner on the road...at 3 a.m. after a show. And, thanks to Morgan Spurlock, we all know what a steady diet of fast food will do. So she'd like to invent "Spray It Ain't So!": a spray that makes hamburgers healthy. What's your invention? Animation by Option G & Erik Maes Directed by Max Joseph Produced by Eve Marson Edited by Simon Hawkins Music by Morningwood

www.good.is/ecosystem Oil is an expensive resource that is rapidly becoming harder to find. Eventually, we are going to have to find a new renewable fuel source to replace it. These scientists think they already have—algae. Produced by Eve Marson and Max Joseph

www.good.is/shows/inventions As a cutting-edge video artist, Lincoln Schatz is familiar with the different ways in which we perceive the world. It is no surprise, then, that for our Inventions series, Schatz should invent a device that allows us to see the world through someone else's mind, literally. What's your invention? Animation by Chris Weller Directed by Max Joseph Produced by Eve Marson Music by The Deadly Syndrome, Why?

www.good.is/shows/inventions Tomlinson Holman knows a thing or two about sound. He created the THX standard for sound systems (THX actually stands for Tomlinson Holman's eXperiment). For our Inventions series he has a new idea: Speakers that make the world a little quieter. What's your invention? Animation by David Lamps Directed by Max Joseph Produced by Eve Marson Music by Yacht, Lusine and Ben Benjamin

www.good.is/shows/inventions You may not think about it all the time, but somewhere, in the back of your mind, you wish you could do a backflip. With Nick Thune's invention, you can. And so can anyone else. Finally, we're all on the same team. What's your invention? Animation by Option G Directed by Max Joseph Produced by Eve Marson Music by Javelin

www.good.is/shows/inventions Our mediated lives are becoming increasingly customizable. From Tivo to ring tones to virtual dashboards and RSS feeds we can re-arrange and manipulate incoming data to our liking. So why not the skies as well? From the inventors of an architecture-themed ice cream sandwich truck comes a pair of spectacles that will give x-ray goggles a run for its money. Freya Estreller and Natasha Case imagine glasses that allow you to photoshop your reality. What's your invention? Visual Effects by Mike Ashton Directed by Max Joseph Produced by Eve Marson Music by Alan Wilkis (http://www.myspace.com/alanwilkis)

www.good.is/ecosystem In our cities, waste collection can be pretty wasteful itself. Garbage trucks have to make near constant trips to keep public trash bins from overflowing—contributing to traffic and pollution. To keep our cities in harmony, we'll have to figure out a better system for urban waste collection. The people at BigBelly Solar already have one solution.

www.good.is/ecosystem Our planet is a fragile ecosystem. To keep it in balance, we must figure out how to improve our urban transportation. B-Cycle in Denver, Colorado offers a unique and sustainable solution for how we can move through our cities. This European-style bike sharing system enables residents of Denver to access bicycles conveniently at various stations throughout the city. By replacing short car rides with environment-friendly biking, B-Cycle helps to keep our air clean, our bodies healthy, and our spirits high. Produced by Eve Marson and Max Joseph

www.good.is/ecosystem Our planet is a fragile ecosystem. To maintain balance, well have to find ways to bring sustainable agriculture to our growing cities. The Science Barge, a floating farm in New York City, is proof that we can. The barge grows produce hydroponically, using only sustainable energy, and teaches local students how to do the same on their rooftops.

www.good.is/shows/inventions In the digital age we can send texts and pics to anyone, anywhere, instantly. But how might we share feelings? Through our feet, obviously. For our Inventions video series, Robert Fabricant, the Creative Director at Frog Design, imagines a new kind of shoe that can take you anywhere. Animation by David Lamps Directed by Max Joseph