The two forms of oxygen found in the atmosphere are

We are lucky that ozone is not stable near the Earth's surface. Why? Give an appropriate answer.

$(a)$ Where is the ozone layer found?
$(b)$ What is an ozone hole and how is it caused?
$(c)$ State the harmful effects of ozone depletion.

List the importance of oxygen gas and ozone gas present in the atmosphere.

Which of the following is a recently originated problem of the environment?

The ozone layer is getting depleted because of: