For the elevation and temperature data given in the table, the existing lapse rate in the environment is _____ ℃/100 m (round off to two decimal places).

$$ \begin{array}{|c|c|} \hline \text { Elevation from ground level (m) } & \text { Temperature }\left({ }^{\circ} \mathbf{C}\right) \\ \hline 5 & 14.2 \\ \hline 325 & 16.9 \\ \hline \end{array} $$

Match the following air pollutants with the most appropriate adverse health effects :

Air pollutant	Health effect to human and/or test animal
(P) Aromatic hydrocarbons	(IV) Carcinogenic effect
(Q) Carbon monoxide	(I) Reduce the capability of the blood to carry oxygen
(R) Sulfur oxides	(II) Bronchitis and pulmonary emphysema
(S) Ozone	(III) Damage of chromosomes

In the context of water and wastewater treatments, the correct statements are:

Which of the following statements is/are TRUE for the aerobic composting of sewage sludge?