This month, scientists and tree lovers celebrate the 2nd birthday of a hybrid chestnut tree that may be a force in reducing the impacts of climate change.

Matt Hickman unravels the mysteries behind offsetting CO2 and buying RECs. (Hint: One of them can fund tree-planting efforts.)

Buy a ticket for your chance to winning millions while fighting climate change.

COTAP will focus its carbon offsetting projects in impoverished countries.

Your car could capture and store carbon dioxide for later disposal, making it zero climate emission even without batteries.

Rarely use your car but keep it around for emergencies? Try a car sharing service.

Traffic driving you crazy? Let MNN get you on track to a more astute commute with these carpooling and public transit tips.

An interview with author Alan Durning on his family's year of living car-lessly.

Car-sharing service Zipcar is betting that name recognition will boost sales of its common stock in an upcoming initial public offering.

Officially called the "3D fast bus," the bus will literally straddle the road and carry passengers over cars and under overpasses.

Many city dwellers are opting to give up driving their own cars for a month to take Zipcar's Low-Car Diet challenge. Could you go car-lite for 30 days?

Car sharing service Zipcar will be adding Toyota Prius plug-in hybrids to its fleet.

"Why do you have to sing everything like you just swallowed a pair of jazz hands?!"

Video: When a 10-mile stretch of L.A.'s interstate 405 is closed this weekend, there will be only one way to get through the gridlock: Fly over it. Take a ride

Personal car-sharing spreads in the U.S., from California to Oregon and, very soon, to a neighborhood near you. The concept of hiring out your own vehicle has p

A 10-mile stretch of Los Angeles' 405 Freeway — the most heavily trafficked road in the country — was completely shut down this weekend as part of a $1 bill

Avis acquires zipcar, but what does it really mean?

Save money and reduce your carbon footprint when you use one of these 7 apps to organize a carpool or book a carshare ride.

Apply to the 30-Day Electric Bike Challenge and you could be selected to receive an e-bike for a month in exchange for swearing off the use of your car.

Enterprise is expanding its carsharing services despite a company executive’s dismissal of the need for a separate carsharing industry.

Bicycle sales exceed cars in Europe, and there's compelling evidence that pedaling increases the national happiness quotient.

We're driving fewer miles and more of us are going car-free, yet we're only scratching the surface of car-isn't-king culture.

Two new studies decipher who prefers which kind of car, revealing unexpected attitudes that challenge many assumptions.

Looking to reduce pollution and congestion, European cities are banning vehicular traffic — and creating vibrant shopping zones in the process.

Helsinki is experimenting with a plan to match people with rides, making cars unnecessary.

As millennials turn away from driving and car ownership, will college students finally stop keeping cars on campus?

Car2Go is now the world's largest service, with a million members and a new outpost in Brooklyn.

Automakers like Volvo, VW, BMW, Audi and Mercedes are going full speed ahead, aiming for autonomous cars on the road by 2025.

FlightCar leverages all those idle vehicles in the long-term lots, and it's a lifeline for frequent flyers.

Quant's fire-breathing electric supercar performs great — on paper. The futuristic battery tech is cool, but will it work?

Autonomous vehicles will be ready soon — to ferry retirees around closed communities.

The Lit Motors C-1 can cruise 200 miles on a charge, and even a truck can't pull it over.

Audi’s R8 e-tron sports car is finally a reality — with almost 300 miles on a charge.

Sales of plug-ins are a fraction of cars sold, but governments and industry are doing their part to make that number grow.

OK, the sound is more like "eeeeeee," but it's still exciting international action, and it's coming to the U.S. in March.

Nine of the top 12 cars on the 2015 ACEEE list are either plug-ins or hybrids.

Exciting new hybrids from Mitsubishi, Kia and Volvo are the talk of the Windy City.

When the weather outside is frightful, battery performance suffers.

Cars with 10 horsepower, fish tanks and Home Depot hardware are just part of the fun. Some even plug in.

These guys aren't shy about taking on Tesla, but first they need to ramp up the factory for this 1,088-horsepower, 200 mph electric from Croatia.

By reducing the urban heat island effect, mass adoption of electric vehicles may even cut our air conditioning bills.

These plug-in supercars are big on sex appeal and horsepower — but you've never heard of the companies that make them.

how to sell electric cars

Local Motors uses tech, crowdsourcing and design contests to create tomorrow's autos today.

At $1 million per mile, the cost of wireless roads would be prohibitive.

Even under poor conditions, Venturi's 240 mph shakes things up at the Bonneville Salt Flats.

Tesla Motors gets some high-powered competition.

The big Japanese auto show is all about plug-in and hydrogen cars — and some even drive themselves.

EV prices are falling, range is rising, and there's free fuel to sweeten the pot.

As CES proves, the gadgets are more important than the color and the trim package.