31.   Fuel cell cars are powered by electricity produced by means of a chemical reaction between oxygen in the air and hydrogen stored in the car as fuel.

32.   Fuel cells produce electricity through a reaction between hydrogen and oxygen, and emit only water.

33.   Fuel cells use a chemical reaction between oxygen and hydrogen to produce electric power.

34.   The FCEV utilizes an electrochemical reaction between hydrogen and oxygen within the fuel cells, rather than through the combustion of fossil fuels.

35.   Toyota also has developed a fuel cell electric vehicle powered by an electro-chemical reaction between hydrogen and oxygen, rather than the combustion of fossil fuels.

36.   Will there be any harmful chemical reaction between the toothpaste and salt?

37.   Experts would also investigate a possible unfavourable reaction between the series of routine vaccinations administered to the troops and the NAPS tablets.