What is a form of pollution triggered by a formation of a gas and can have dramatic effects?

fog
pesticides
acid rain
oil spill

acid rain

http://sanfrancisco.cbslocal.com/2013/07/24/bay-area-environmental-group-suing-epa-over-pesticide-drift/

The correct answer is acid rain. Acid rain is a form of pollution that occurs when certain gases, such as sulfur dioxide and nitrogen oxide, are released into the atmosphere. These gases can undergo chemical reactions with water, oxygen, and other substances in the air to form acidic compounds. When these acidic compounds fall to the ground as precipitation, it is called acid rain.

To determine the correct answer, you can follow these steps:

1. Identify the different options provided: fog, pesticides, acid rain, and oil spill.
2. Understand that all options are related to pollution, but the question asks for a form of pollution triggered by the formation of a gas that can have dramatic effects.
3. Consider each option individually and evaluate whether it matches the criteria.
4. Fog is a natural meteorological phenomenon and not necessarily triggered by gas formation, so it can be eliminated as the answer.
5. Pesticides are chemicals used to control pests in agricultural practices but are not directly linked to gas formation, so it can also be eliminated.
6. Acid rain, as explained earlier, is a result of gas emissions reacting with substances in the atmosphere, making it a suitable answer.
7. An oil spill is a different kind of pollution caused by the release of oil into an aquatic environment, not specifically related to gas formation. Therefore, it can be discarded as the answer.

By following these steps, you can identify acid rain as the correct answer to the question.