The internal combustion engine changed the way people live. Whereas before, people were limited to subsistence farming or working near their own property, cars and other vehicles allowed for the growth of cities. However, that advancement was a mixed blessing, as the heavy use of fossil fuels has been implicated in increasing levels of several environmental pollutants, and supplies of things like petroleum are dwindling. To combat these issues, automotive manufacturers developed hybrid cars.
Hybrid cars were designed to combine the best features of regular gasoline and electric automobiles. They get far better gas mileage than gasoline-powered cars do, but are more powerful and can travel longer distances than their purely electric counterparts. Many modern hybrids are attractive, even sporty-looking cars, and virtually indistinguishable from regular automobiles on the outside. Many of them run more quietly than gasoline-powered cars, and produce less noxious exhaust. When a hybrid car has to go uphill, or perform other demanding tasks, it can use gasoline power to provide enough power to get the task done. All told, they are a great compromise between the power of a gasoline-powered vehicle, and the cleanliness of an electric vehicle.
However, these hybrids aren't a really permanent solution- since they still rely on fossil fuels to run, they only help delay the inevitable. Since they rely on batteries, components of them must be disposed of as hazardous waste. Vehicles that require an external power supply need to have electricity provided to them, and often times this electricity comes courtesy of a coal power plant. Even areas powered by nuclear energy have their own particular problems, since nuclear waste eventually needs to be disposed of, and there isn't really a very good, clean way to eliminate spent nuclear waste yet. What's more, hybrid cars tend to be very expensive, making them cost-prohibitive for many consumers. Though they do use less gasoline, there are several disadvantages to hybrid vehicles that must be considered before they can really be declared a truly green, environmentally friendly transportation solution.
Hybrid cars are still being perfected, and have come a long way since their earliest models. These new cars are faster, more powerful, and capable of traveling greater distances than their forebears. In the future, new hybrid cars that combine electricity and fuels other than gasoline might end up being the solution to pollution and fossil fuel shortages that the world has been hoping for.
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