Clean Vehicles
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Introduction:
Our world is in constant movement, planes that cross the Pacific Ocean from to side, trucks that bring merchandise from north to south, east to west and from all parts to all parts and, finally, person that goes from a side to another one. But to move, a lot of people uses their cars, which works with benzine, that simultaneously is done of petroleum. The benzine, when it is being burned to make the car works, generates a lot of carbon dioxide (CO2), one of the main causes of the climate change. It is for that reason that there are scientists that don't sleep good knowing that there are cars polluting outside and people is investigating how to reduce the amount of carbon dioxide that the cars produce.
Hybrid cars
A hybrid car is who utilize benzine and electricity to work. These cars, while they accelerate, they charge a battery, that is used soon, what eliminates the necessity to burn fuel in some occasions. The challenge to make hybrid cars is to treat to create the smaller resistance to the possible wind and to construct using light materials, but resistant to a car crash, to improve the yield of battery. They can serve us in a short term, because its already in the market, to be reducing the emissions little by little, but they not can be took like a definitive solution, because it utilize fossil fuels, will be finished one day.
Cars to hydrogen
A hybrid car contaminates, because some day it will have to burn fuel, that isn't the case of the cars to hydrogen, who, like its name says, utilize only the hydrogen to work. These cars produce nothing of CO2 with exception of the relation of the lubricants, but are very short. There are to types of hydrogen cars: those that use of the same form that the benzine, that is burning the hydrogen with the oxygen to produce a combustion ad the other one is utilizing fuel cells, that they work separating electrons of hydrogen to create a current flow. The only reminder of this operation is the water and oxygen. The problem of the cars that works with hydrogen is that they are to expensive, it is not very efficient to generate electricity and its very difficult to handling the hydrogen, which is very inflammable when it is in contact with the oxygen, aside from it has to be conserved in low temperatures.
Sources
http://en.wikipedia.org/wiki /Hybrid_cars
http://en.wikipedia.org/wiki /Fuel_cell
http://en.wikipedia.org/wiki /Hydrogen_car
http://eartheasy.com/live _hybrid_cars.htm