Which of the following atmospheric pollutants is not emitted by vehicles?

Which of the following practices will not come under green chemistry?
$1$. Using soaps made of vegetable oils instead of synthetic detergents,whenever possible.
$2$. Using $H_2O$ for bleaching purposes instead of chlorine-based bleaching agents.
$3$. Using liquefied $CO_2$ for dry cleaning clothes and laundry.
$4$. Using plastic cans for neatly storing substances.

Explain the types of particulate pollutants.

Explain tropospheric pollution caused by oxides of sulphur with suitable examples.

In which of the following industries is animal protein produced as waste?

Identify the types of smog that are oxidizing and reducing in nature.