The fuel cells

 
What are the fuel cells ?
Fuel cells generate electricity in a chemical reaction between hydrogen and oxygen, which yields only pure water vapor. This water vapor provides enough energy to drive.
Fuel cell vehicles (FCVs) have the potential to significantly reduce our dependence on foreign oil and lower harmful emissions that cause climate change.

Advantages of the fuel cell over the electric car :

• The electric car needs an Electric- power transmission that depends on different generators : wind turbines, hydropower plants, solar panels...
  They have a low production and they are not enough to provide energy for our cars, homes, factories...
  The fuel cell reduces the dependence on these generators or on the foreign oil since hydrogen can be derived from  water ( including seawater) 
•  Less  greenhouse gas emissions
•  Less pollution of the environment 
  
  

The highest disadvantage is the opposition of the big economic superpowers to change the oil by the water. But some international companies like Mercedes Benz are starting to take steps in this project.