Answer: To reduce respiratory diseases and ocean acidification
Step-by-step explanation:
The main reason why countries should work together to manage air pollution is due to the harmful effects on human beings and animals.
Air pollution makes the air polluted which is when inhaled by human being and aquatic animals.
There are many harmful effects of air pollution because animals and plants inhale carbon dioxide either present in air or gets dissolved in ocean water.
So, air pollution should be reduced.