Give advantages of fuel cell.

(N/A) The advantages of fuel cells are as follows:
$1$. High Efficiency: Fuel cells convert the chemical energy of fuels like $H_2$ and $CO$ directly into electrical energy with high efficiency (typically $70-80\%$),unlike thermal power plants which are limited by Carnot cycle efficiency.
$2$. Pollution-Free: Since the byproduct of hydrogen-oxygen fuel cells is water $(H_2O)$,they are environmentally friendly and do not produce harmful pollutants.
$3$. Continuous Supply: As long as the reactants ($H_2$ and $O_2$) are supplied,the cell will continue to produce electricity.
$4$. Lightweight and Compact: They are ideal for space applications due to their high power-to-weight ratio.