24 Dead zones are areas found in the oceans and some large lakes where there...

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Biology

24 Dead zones are areas found in the oceans and some large lakes where there is not enoughoxygen to support life. Algae blooms occur when excess nutrients are introduced as pollutantsfrom fertilizers, sewage-treatment plants, and the burning of fossil fuels. When the algae die and undergo decay, bacteria rapidly use the oxygen in the area. Which human activity would most likely result in a decrease in the size and number of dead zones?(1) irrigating fields and lawns to increase runoffinto the ocean and rivers(2) building more coal-fired electrical generatingplants(3) reducing the use of chemicals on farm fieldscourses(4) constructing more sewage-treatment plants onthe shores of lakes and rivers

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24 Dead zones are areas found in the oceans and some large lakes where there is not enoughoxygen to support life. Algae blooms occur when excess nutrients are introduced as pollutantsfrom fertilizers, sewage-treatment plants, and the burning of fossil fuels. When the algae die and undergo decay, bacteria rapidly use the oxygen in the area. Which human activity would most likely result in a decrease in the size and number of dead zones?(1) irrigating fields and lawns to increase runoffinto the ocean and rivers(2) building more coal-fired electrical generatingplants(3) reducing the use of chemicals on farm fieldscourses(4) constructing more sewage-treatment plants onthe shores of lakes and rivers