Dear student,
i. “Water is not precious. We should not bother about its wasteful use” this statement is false because water is very useful and without it, we cannot sustain our lives.
ii. “All sources and substances have equal economic value” this statement is false because it may be true that some substance has less economic value than other. Like a house has more economic value than a pen.
iii. “We should minimize the depletion of natural resources” is true. This is because resource scarcity is going to be observed in near future.
iv. “People are human-made resources”-this statement is false as people are a human resource where the human-made resource is like technology, created by people.
Regards