Wasted food = methane gas. The food that we send to landfills doesn’t compost and turn into lovely dirt. That’s because landfills don’t provide air or light. And when food rots without sufficient oxygen, as it does in a landfill, methane gas is produced.
Why it causes enviroment pollution:
Environmental Impact of Food Waste in the US. … Additionally, most uneaten foodrots in landfills where it accounts for almost 25% of U.S. methane emissions. Methane is a powerful greenhouse gas that is 21 times more harmful to theenvironment than CO2.