Home Environment 11 Big Advantages and Disadvantages of Hydrogen Fuel Cells 11 Big Advantages and Disadvantages of Hydrogen Fuel Cells Environment Jun 4, Hydrogen is an environmentally friendly alternative to fossil fuels, and they can be used to power just about any machine needing energy. The fuel cell, which is the energy conversion device that can capture and use the power of hydrogen effectively is the key to making this happen. List of Advantages of Hydrogen Fuel Cells 1.
That almost equals theelectric cars and plug-in hybrids now on American roads. Low emissions, much less zero emissions, are only true in certain places where most of the electricity comes from a mix of low-carbon sources such as the sun, wind or nuclear reactors.
Electric cars are great for eliminating oil from transportation, because very little U. But electric cars may or may not help the country combat climate change—and it all depends on where the electricity comes from. Thomas Edison and his electric car.
Scientific American, January 14, Cars and trucks are responsible for roughly 24 percent of U.
Because those emissions come from hundreds of millions of tailpipes, this source of pollution seems difficult to control. Shifting it to hundreds of smokestacks at power plants that supply electricity to charge electric cars therefore seems like a more effective way to clean up the fleet.
But those smokestacks, many attached to coal-fired power plants, are the single-largest source of greenhouse gas pollution in the U. That source would grow as electric cars demand more and more electricity, unless tighter pollution controls are placed on power plants or electric utilities shift to less polluting sources such as solar.
As it stands, a conventional Toyota Prius hybrid vehicle, which burns gasoline when its batteries are not engaged, and the all-electric Nissan Leaf produce roughly the same amount of greenhouse gas pollution: In California, which has one of the highest proportions of clean electricity in the country, the electric vehicle would produce only grams per mile, half that of the hybrid.
Ditto for Texas and even Florida. But in the Midwest and South, where coal fuels the bulk of electricity generation, a hybrid produces less CO2 than an electric car.
In fossil fuel—dependent Minnesota an electric car would actually emit grams per mile of greenhouse gases. As a result, some researchers suggest that a regional approach to clean vehicle standards makes more sense than national standards that effectively require electric cars across the board.
Minnesota could go for hybrids and California could go for electric vehicles. Nighttime is often when the wind blows but it is also when utilities like to run only their coal-fired power plants.
A recent study found that an electric car charged by utilities at night in the regional grid that stretches across Ohio, Delaware, Pennsylvania and Virginia creates more greenhouse gas pollution than if owners plugged in their vehicles at random times throughout the daytime, when the utility fuel mixes are more varied.
The same argument applies worldwide. Driving an electric car in China, where coal is by far the largest power plant fuel, is a catastrophe for climate change. And if the coal plant lacks pollution controls—or fails to turn them on—it can amplify the extent of smog, acid rain, lung-damaging microscopic soot and other ills that arise from burning fossil fuels.
The same is true in other major coal-burning countries, such as Australia, India and South Africa. The changeover produces less CO2, making electric cars cleaner across the country, roughly equivalent to a hybrid.
On the other hand, the primary constituent of natural gas—methane—is itself a potent greenhouse gas. In short, electric cars are only as good as the electricity that charges them.
In the absence of clean electricity, hybrid cars that can travel 50 or more miles on a gallon of gasoline produce the least emissions.
Electric cars still constitute less than 1 percent of U. So their environmental benefit—dubious for now, until more power plants get off coal—is not very worrisome.
The current shift back to SUVs that guzzle much more petroleum than other cars, prompted by low gasoline prices, is a more worrisome sign for future climate change. Perhaps by the time electric cars are ubiquitous, pollution from generating electricity will be zero.All-electric vehicles (EVs) run on electricity only.
They are propelled by an electric motor (or motors) powered by rechargeable battery packs. EVs have several advantages over vehicles with internal combustion engines (ICEs). California Renewable Energy Overview and Programs. California, with its abundant natural resources, has a long history of support for renewable energy.
When used as a vehicle fuel, natural gas can offer life cycle greenhouse gas (GHG) emissions benefits over conventional fuels, depending on vehicle type, drive cycle, and engine calibration. In addition, using natural gas may reduce some types of tailpipe emissions.
Natural gas is increasingly used. Discover Toyota Mirai, the future of hydrogen cars. Learn more about how Mirai works, Mirai safety & the all-new Mirai price. Plus, locate Mirai fueling stations & view Mirai photos on the Official Toyota Mirai site.
Plug-in hybrid electric vehicles (PHEVs) use batteries to power an electric motor and use another fuel, such as gasoline or diesel, to power an internal combustion engine or other propulsion source. Using electricity from the grid to run the vehicle some or all of the time reduces operating costs.
Benefits of electric vehicles. There are a number of great benefits to electric vehicles (EVs) over conventional petrol/diesel cars. Cheaper to run.
Owners of an EV have the advantage of much lower running costs. The electricity to charge an EV works out around a third as much per kilometre as buying petrol for the same vehicle 1.