The green plants capture about $10 \%$ of the energy of sunlight that falls on their leaves and convert it into food energy.

Suggest any four activities in daily life which are eco-friendly.

What is meant by 'non-biodegradable' waste? Identify biodegradable waste from the following:
Empty packet of chips,empty plastic bottle of mineral water,empty paper box of sweets,empty tin of a cold drink.

State one important function of ozone layer in the atmosphere. How is it formed there? Which compounds are responsible for the depletion of ozone layer? How do these compounds enter into the atmosphere?

In a food chain consisting of grass,insect,frog,and snake,what is the trophic level of the frog?

Write any two consequences if decomposers are removed from the ecosystem.