Prevention over Pick up

Obviously one key element to nature conservation is prevention rather than pick up. I've started to realize that the big car companies have very little with the oil issue. Our world is running out of oil yet the car companies do not fully switch over their technology to another source of fuel. There are plenty of other fuel sources like electricity or hydrogen. Even water is a possibility. The car company definitely has the technology and money to find new sources. They just choose not to take the time to change all their vehicles because they are making enough money as it is. I believe that if we want to have a chance at stopping global warming then we have to act on the car companies. There needs to be a law about how many oil dependent cars produced each year. If there is a law on this then the car companies will be forced to create other types of cars that run on different types of technology. In the end though if things aren't changed, our coastal wetlands and natural habitats will be demolished by global warming.