Fill in the following blanks with suitable words BYJU'S
a) Fossil fuels are coal, petroleum and natural gas. b) Coal contains mainly carbon c)The slow process of conversion of dead vegetation into coal is callled carbonization. d) Process of separation of different constituents from petroleum is called refining. e) The least polluting fuel for vehicles is compressed natural gas. f) The burning of fossil fuels causes air pollution and also leads to ...