Define Greenhouse gases and list out its examples

Name any four greenhouse gases.

Define global warming.

Methane is one of a potent green house gas. Point out a few sources from where methane is generated.

List out the anthropogenic sources of Nitrous oxide.

What is Dobson unit?

What do you mean by good ozone and bad ozone?

What is ozone layer? Why it is essential?

Define ozone hole. Name anyone potent chemical that is responsible for the effect.

Where did Montreal Protocol was held? State its objectives.

What is meant by biological indicators? Give example.

Name the plant species which act as indicators for Nitrate pollution & Flouride pollution.

Define the term Agroforestry. Name any two major tree species cultivated in Agroforestry.

Write the uses of silvopasture system.

Mention the name of any four plant species that are widely used as live fences in agricultural practicer.