Question

Compressed natural gas (CNG) is *​

Answer 1

Answer:

CNG, also known as compressed natural gas, is an eco-friendly alternative to gasoline. Made by compressing natural gas (methane) down to less than 1% of its volume, CNG fuel is safer than gasoline and diesel because it is non-toxic and does not contaminate ground water.

Answer 2

Answer:

a kind of petroleum has extracted from beneath the earth.

It is also cheap and creates less pollution.