This blog contains notes, questions, answers and solved past papers for O levels Pakistan Environment 2059 Geography.

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Secondary Industry as a System

  Secondary and Tertiary Industries ·          Secondary industry is concerned with changing raw material from the primary sector or s...

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Wednesday, September 4, 2019

Biogas and Pakistan



Definition

•    It is produced from animal and plant waste.
•    Fermentation of cow-dung gives off methane gas

Uses

•    Methane gas is used for cooking, heating and other purposes

Potential benefits and challenges of Biogas in Pakistan

•    Biogas projects are in the process of development.
•    Although, biogas is a cheap source of energy, it means cow-dung can no longer be used as manure.
•    If this happens on a large scale it will aggravate the deficiency of a soil already lacking in organic nutrients.
•    It will increase air pollution because methane is a greenhouse gas

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