81.
What is the main cause of landslides in deforested areas?

82.
Which practice helps in sustainable groundwater management?

83.
What type of rock is most susceptible to chemical weathering causing sinkholes?

84.
Which of the following gases is a significant greenhouse gas contributing to global warming?

85.
What is the main environmental concern with mining activities?

86.
What is meant by �sustainable development� in environmental geology?

87.
What role do wetlands play in environmental sustainability?

88.
What is the primary pollutant responsible for ozone layer depletion?

89.
Which type of waste is biodegradable and suitable for composting?

90.
What is the consequence of over-pumping groundwater in coastal areas?

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