$DDT$ residues are rapidly passed through food chains causing biomagnification. What is the reason for this?

What is Agent Orange?

$2$-wheelers Bharat Stage-$III$ $(BS-III)$ norms were implemented throughout the country in:

In coal-fired power plants,electrostatic precipitators are installed to control the emission of........

If $O_2$ is consumed more by microorganisms in water,what does it indicate?

In the treatment of wastewater,scientists at the Arcata Marsh (a project associated with Humboldt State University) developed a series of six connected marshes over how much area to remove heavy metals and other pollutants?