Question

which of the following gives a pollution free environment when burnt
1) dung cakes
2) kerosene
3) wood
4) biogas​

Answer 1

biogas is the answer dear please mark me as brainlist please

Answer 2

Biogas​ gives a pollution free environment when burnt

Explanation:

• Dung cakes: These are traditionally used as fuel in India for cooking food on a domestic fire called a Chulha, which is manufactured from by-products of animal husbandry. They are originally created by hand by village women from cow or buffalo dung.
• Kerosene: Kerosene ,often written kerosine, is a flammable hydrocarbon liquid that is extensively used as a fuel. It is also known as paraffin or paraffin oil. Kerosene is typically pale yellow or colourless, with a pleasant odour.... Drake in 1859, petroleum quickly became the most important source of kerosene.
• wood: The main component of trees is wood. The xylem vessels that carry water up the plant compose the majority of it. cellulose and lignin are the two primary components of wood. A lumberjack is a person who works with trees to cut them down. The wood from a fallen tree can be chopped into long, straight pieces known as lumber.
• Biogas​: Anaerobic decomposition or thermochemical conversion of biomass produces biogas, an energy-rich gas. Methane (CH4), the same component found in natural gas, and carbon dioxide (CO2) make up the majority of biogas... Biogas is produced in municipal solid waste landfills and livestock manure holding ponds and can be collected.