Explanation:

Let’s analyze each statement:

- Statement 1: The ozone layer in the higher atmosphere acts as a shield against harmful UV radiation. (True)

- Statement 2: Depletion of the ozone layer results in more UV radiation reaching Earth, raising skin cancer risks. (True)

- Statement 3: The Kyoto Protocol mainly addresses climate change by reducing greenhouse gases, not ozone conservation. The Montreal Protocol targets ozone protection. ? (False)

- Statement 4: Ozone at ground level is harmful and can cause respiratory problems. (True)

- Option 1 (1, 2, 3 & 4): Includes the incorrect statement 3.

- Option 2 (2 & 3): Includes a correct and an incorrect statement.

- Option 3 (1 & 3): One correct and one incorrect statement.

- Option 4 (1, 2 & 4): Only includes correct statements.

Correct Answer: Option 4 (1, 2, & 4)