Rotting waste in landfills produces a gas that can be captured and used to generate electricity. what is this gas called?

The gas produced will be methane gas.

Explanation:

When waste is filled in the landfills, it gets rotten and it undergoes an aerobic decomposition (In the presence of oxygen), little methane gas is produced.

When the waste remains there, i less than a year, anaerobic conditions begin to generate (in the absence of oxygen) and methane-producing bacteria begin to decompose the waste and produces methane in a large amount.

This gas is also known as marsh gas and is considered as a greenhouse gas. This gas increases the temperature of the Earth's surface.

Hence, the gas produced will be methane gas.

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~courtney

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons