Give one example each from your daily life where the household waste can be effectively reused and recycled respectively.

$(a)$ Why are coal and petroleum called fossil fuels?
$(b)$ Name any two elements present in fossil fuels in addition to carbon.

Differentiate between biodegradable and non-biodegradable substances with the help of one example each. List two changes in habit that people must adopt to dispose of non-biodegradable waste,for saving the environment.

Prepare a list of five activities that you perform daily in which natural resources can be conserved or energy utilisation can be minimised.

Ground water will not be depleted due to

Which of the following is the correct match between List-$I$ and List-$II$?

List-$I$	List-$II$
$1$. Python	$a$. Tapti River
$2$. Hangul	$b$. Sabarmati River
$3$. Monal	$c$. Endangered Mammal
$4$. Dharoi Dam	$d$. Endangered Reptile
	$e$. Endangered Bird