The presence of large amounts of nutrients in water causes excessive growth of planktonic algae,called.........

Euro $II$ norms stipulate that sulphur be controlled at . . . . . . $ppm$ in diesel and . . . . . . $ppm$ in petrol.

Compressed Natural Gas $(CNG)$ is primarily composed of:

Nitrogen oxides are produced from the emissions of automobiles and power stations,which are a source of fine particulate matter in the air,leading to the formation of .....

In Minamata Bay,Japan,which of the following animals remained free from Minamata disease?

Which of the following is/are primary air pollutant$(s)$?