Q52. What are the advantages and disadvantages of biogas?
Q53. What are the advantages and disadvantages of solar energy?
Q54. Distinguish between metallic and nonmetallic minerals.
Q55. Distinguish between ferrous and nonferrous minerals.
Q56. Explain why fossil fuels might become exhausted.
Why fossil fuels are likely to be exhausted soon?
Q57. Describe the mineral distribution in North America.
Q58. Explain how hydroelectricity is produced.
What is hydroelectricity?
What is hydel power?
Q59. Write a short note on distribution of minerals in Africa.
Q60. Write a short note on distribution of minerals in Antarctica.