The present population of the world is about:
Correct answer: B. 6 billion
- A. 15 trillion
- B. 6 billion
- C. 500 million
- D. 100 million
Explanation
As this question appeared in 1997, so the population of world in mid 1997 was 5, 840, 324, 240 i.e., approximately 6 billion.
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Ecosystems include biotic and abiotic components, food chains and webs, energy flow, nutrient cycles, populations and ecological relationships. Pollution and conservation cover air, water, soil and noise pollution, their effects on organisms, biodiversity loss, protected areas, sustainable resource use and methods for reducing environmental damage.
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