Assertion (A): UV radiation causes photodissociation of ozone into `O_(2)` and O, thus causing damage to the stratospheric change.
Reason (R): Ozone hole is resulting in global warming and climate change.

These questions consist of two statement each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is a correct explanation of the Assertion. B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion: UV-radiations cause photodissociation of ozone into O_2 and O thus causing damage to stratosopheric ozone layer. Reason. Ozone hole is resulting due to global arming and climatic change.

Assertion : Ozone is destroyed by CFCs in the upper stratosphere. Reason : Ozone holes increase the amount of UV radiation reaching the earth.

Discuss the causes of global warming and ozone-layer depletion

Assertion (A) : The decline in the thickness of the ozone layer over restricted area is called ozone hole. Reason (R) : An Ozone hole is really not a hole but rather a thinning of the ozone layer in the stratosphere.

Assertion : CO_2 and methane are called greenhouse gases. Reason : These - radiate heat and radiations cause global warming.