Commercial sources of energy purely consist of
A. power, coal, oil, gas, hydro-electricity and uranium
B. coal, oil, firewood, vegetable waste and agricultural waste
C. power, coal, animal dung and firewood
D. coal, gas, oil and firewood
Answer:A
Commercial sources of energy purely consist of
A. power, coal, oil, gas, hydro-electricity and uranium B. coal, oil, firewood, vegetable waste and agricultural waste C. power, coal, animal dung and firewood D. coal, gas, oil and firewood