All statements regarding $BOD$ (Biochemical Oxygen Demand) are correct,except:
- AIt refers to the amount of oxygen that would be consumed if all the organic matter in one liter of water were oxidized by bacteria.
- B$BOD$ test is a measure of the organic matter present in the water.
- CThe greater the $BOD$ of wastewater,the lower is its polluting potential.
- DWastewater is treated until the $BOD$ is reduced significantly.
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$I.$ Chemical fertilizers cause pollution of water bodies as well as groundwater,besides getting stored in crop plants. Therefore,environmental scientists are pressing for a switch over to organic farming.
$II.$ Organic farming is a form of agriculture that relies on techniques such as crop rotation,green manure,compost,and biological pest control.
$I.$ Chemical fertilizers cause pollution of water bodies as well as groundwater,besides getting stored in crop plants. Therefore,environmental scientists are pressing for a switch over to organic farming.
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