ECOLOGY
ENVIRONMENTAL ISSUES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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fertilizers and pesticides have chemicals that run off into water sources
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fertilizers and pesticides are dumped into lakes and rivers
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farmers dump unsold produce into the river
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None of the above
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Detailed explanation-1: -Farms discharge large quantities of agrochemicals, organic matter, drug residues, sediments and saline drainage into water bodies. The resultant water pollution poses demonstrated risks to aquatic ecosystems, human health and productive activities (UNEP, 2016).
Detailed explanation-2: -Pesticides and fertilizers used in agriculture can contaminate both groundwater and surface water, as can organic livestock wastes, antibiotics, silage effluents, and processing wastes from plantation crops.
Detailed explanation-3: -Answer: The use of pesticides in agriculture is responsible for causing water pollution. It is also caused due to the excessive use of fertilizers in the fields. It acts as a food for algae and the growth will leads to reduce the oxygen content of water and kill many aquatic organisms.
Detailed explanation-4: -consumption increased exponentially throughout the world, causes serious environmental problems. Fertilization may affect the accumulation of heavy metals in soil and plant system. Plants absorb the fertilizers through the soil, they can enter the food chain. Thus, fertilization leads to water, soil and air pollution.
Detailed explanation-5: -Fertilization of surface waters (eutrophication) results in, for example, explosive growth of algae which causes disruptive changes to the biological equilibrium [including fish kills]. This is true both for inland waters (ditches, river, lakes) and coastal waters. Groundwater is being polluted mainly by nitrates.