Acid rain and Carbon dioxide

Acid rain noun - Rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water.

Carbon dioxide and acid rain are semantically related. in air pollution topic. In some cases you can use "Carbon dioxide" instead a noun phrase "Acid rain".

Carbon dioxide noun - A heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis.

Acid rain and carbon dioxide are semantically related. You can use "Acid rain" instead a noun phrase "Carbon dioxide".