If you are like many car owners who wonder how to build a hydrogen fuel cell and more importantly, how it will benefit you, here it is. Firstly, the hydrogen fuel cell produces a renewable energy from water, known as HHO gas or hydroxy. This gas, when mixed with normal gasoline, greatly enhances overall fuel efficiency. This means more cash savings for you. Secondly, the clean-burning fuel that is produced enables your vehicle to operate more smoothly and with a better engine performance. Thirdly, your car produces far less harmful pollutants. By using a hydrogen fuel cell, you play a huge role in protecting the environment and the air that you breathe.