How is non-degradable industrial solid waste disposed of?

What do you mean by green chemistry? How will it help decrease environmental pollution?

Given below are two statements :
Statement $I :$ The $pH$ of rain water is normally $\sim 5.6$.
Statement $II :$ If the $pH$ of rain water drops below $5.6,$ it is called acid rain.
In the light of the above statements,choose the correct answer from the options given below:

Acrolein $(X)$ is one of the chemicals formed when $O_3$ and $NO_2$ react with unburnt hydrocarbons present in the polluted air. The structure of '$X$' is

Which of the following practices will not come under green chemistry?

Which of the following processes is $NOT$ used to preserve food?