A hydrogen vehicle is a vehicle that uses hydrogen as its on-board fuel for motive power. The term may refer to a personal transportation vehicle, such as an automobile, or any other vehicle that uses hydrogen in a similar fashion, such as an aircraft. The power plants of such vehicles convert the chemical energy of hydrogen to mechanical energy (torque) in one of two methods combustion, or electrochemical conversion in a fuel cell .some car mamufcture are makind hydrogen cars like bmw ant tyota. these cars will no co2 emissions and this then will help to stop the ice caps from melting and this will help stop the greenhouse effect.

bmw are one of the worldes best nowen car deallers.they had 28 differnt makes of cars. there best tipe i think is the m5 of m3.thes cars hre the sport vershion of 5 and 3 series.they employed over 100.000 people world wide. the bmw m 5 has a 7 speed gear box the car dos o to 100 km in under 4.7 seconds and its top speed is 155 mph or 150 km Today, BMW of North America announced the successful completion of the first-ever hydrogen-powered luxury sedan. it wasd tested by NASA.the will help bring down the co2 emishions