1) What percentage of the Earth's fresh water is available to us? a) 97% b) 1% c) 7% d) 50% 2) Many people on Earth do not have access to clean water a) True b) False 3) Water harvesting’ has emerged as a sensible method of meeting the water shortfall in a cost-effective manner and is now being applied in most cities. Water harvesting is the a) Collection of water from river b) Harvesting of water from tube wells c) Collection of rainwater in storage tanks or putting back into the soil to recharge groundwater 4) Water fit for consumption by humans is called _____ a) Impure water b) Clean Water c) Topable Water 5) Freshwater can be unsafe for drinking for which of the following reasons? a) Infectious disease b) Poisonous chemicals c) Both a and b 6) Where is most water found on Earth? a) Oceans b) Rivers c) Taps d) Lakes

Water

列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?