英语作文My New Invetion

I want to invent a new kind of eco-car.
First of all, it is designed forprotection of ourenvironment. It uses carbon dioxide to become fuel and blows out oxygen to start the engine;as a result,I believe the air in Beijing will become fresher.
In the case of an earthquake, when it comes to a cliff, it will change into a helicopter; when it comes to a river formed by floods, it will change into a boat; when it comes to a muddy puddle, as often seen in Beijing in rainy days, it will become a carwithcaterpillar tracks.
Maybe at the moment, it is just my idea, but I do believe more and more innovations will be introduced!