Rural areas: Rural areas include bio gas, gobar gas, materials made up of wood and bricks to create energy. These are much safer and cheaper than the ones used in urban areas.

Urban areas: Urban areas include petroleum, kerosene, coal, etc to create energy. These are a bit more in hazardous effects which causes pollution when burnt while the ones used in rural areas doesn't.
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Thank You Yasmin for giving me the answer and helping me in my assignment...
You're welcome!