Question

why is hydrogen considered as a better and cleaner fuel than CNG

mention any 2 areas where ssolar energy is used

Answer 1

1- Hydrogen gas is cleaner than CNG. CNG contains hydrocarbons. Therefore, it has carbon contents. Carbon is a form of pollutant present in CNG. On the other hand, hydrogen is waste-free. The fusion of hydrogen does not produce any waste. Hence, hydrogen is cleaner than CNG.
2- Two areas where solar energy is used:
(i) Cooking food
(ii) Generating electricity
Solar cooker- In solar cooker, solar energy is converted into heat energy.
Solar Panel-​ Solar panel is basically used to generate electricity using the solar energy.