What are the advantages of using biogas?

Explanation

Cretinism: It is caused due to decreased secretion of thyroid hormone (thyroxine) in children. The conditions are stunted growth, mental defect, lack of skeletal development and deformed bones.
(ii) • Brightly coloured flowers, with smell and nectar.
• Pollen grain are larger in size, the exine is pitted, spiny so they can be adhered firmly on the sticky stigma.
(iii) The advantages of using biogas are as follows:
(a) It burns without smoke and therefore causing less pollution.
(b) An excellent way to get rid of organic wastes like bio-waste and sewage material.
(c) Left over slurry is a good manure rich in nitrogen and phosphorus.
(d) It is safe and convenient to use.
(e) It can reduce the amount of green house gases emitted.