Methane in the polluted air reacts with oxygen to form which of the following compounds?

Which of the following is a particulate pollutant?

Given below are two statements :
Statement $I$ : If $BOD$ is $4\,ppm$ and dissolved oxygen is $8\,ppm$,then it is a good quality water.
Statement $II$ : If the concentration of zinc and nitrate salts are $5\,ppm$ each,then it can be a good quality water.
In the light of the above statements,choose the most appropriate answer from the options given below :

Do you observe any soil pollution in your neighbourhood? What efforts will you make for controlling the soil pollution?

Methyl mercaptans are generated as waste from which industry?

Global warming is due to an increase of: