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This means that a bicycle will use between 10 and 25 times less energy per distance travelled than a personal car, depending on fuel source and size of the car. This figure does depend on the speed and mass of the rider: greater speeds give higher air drag and heavier riders consume more energy per unit distance.
Motorists who shifted travel modes from cars to bikes as their 'main method of travel' emitted 7.1 kg (16 lb) less CO 2 per day. [19] Regular cycling was most strongly associated with reduced life cycle CO 2 emissions for commuting and social trips. [19] Changing from motorised to non-motorised travel behaviour can also have significant effects.
A green vehicle, clean vehicle, eco-friendly vehicle or environmentally friendly vehicle is a road motor vehicle that produces less harmful impacts to the environment than comparable conventional internal combustion engine vehicles running on gasoline or diesel, or one that uses certain alternative fuels.
Also other battery electric vehicles, which may shift emissions to the location where the electricity is generated (if the electricity comes from coal or natural gas power plants—as opposed to hydro-electric, wind power, solar power or nuclear power plants); [5] and fuel cell vehicles powered by hydrogen, which may shift emissions to the location where the hydrogen is generated.
Plug-in hybrids and electric cars run off lithium-ion batteries and rare-earth element electric motors.Electric vehicles use much more lithium carbonate equivalent in their batteries compared to the 7g (0.25 oz) for a smartphone or the 30 g (1.1 oz) used by tablets or computers.
Car travel increased steadily throughout the twentieth century, but trends since 2000 have been more complex. Oil price rises from 2003 have been linked to a decline in per capita fuel use for private vehicle travel in the US, [92] Britain and Australia. In 2008, global oil consumption fell by 0.8% overall, with significant declines in ...
Some cars also use a half size spare tire, for weight/cost/space saving purposes. On a typical vehicle, every extra 55 pounds (25kg) increases fuel consumption by 1 percent. [7] Removing roof racks (and accessories) can increase fuel efficiency by up to 20 percent. [7]
CNG must be stored in high-pressure cylinders (21,000 to 25,000 kPa (3,000 to 3,600 psi)), and LNG must be stored in cryogenic cylinders (−162 to −129 °C (−260 to −200 °F)). These cylinders take up more space than gasoline or diesel tanks that can be molded in intricate shapes to store more fuel and use less on-vehicle space.