Tag: reason for finishing of materials (resources)

The main component of natural gas is methane $CH _4$ some other gases like butane ethane are also present.
Hence option A is correct.

Use of public transport system instead of private vehicles decreases the pollution as many people use only one vehicle which consume less fuel.It decreases the fuel consumption and pollution.
Hence option B is correct.

Natural gas is best to use as fuel because it produces less pollution and more efficiency.Less quantity is needed for more work.
Hence option D is correct.

Deforestation  is decrease in number of trees in forest so this leads to in decrease the photosynthesis process which in turn increases the pollution.
Hence option A is correct.