If I remember correctly, acidic ocean water helps destroy coral reefs.

Also if I remember correctly, coal burning increases the amount of aluminum in the atmosphere. Normally aluminum is relatively harmless. But when it gets dumped freely on forests during a rain storm it can damage or even kill the trees.

Acid rain, probably mainly sulfuric acid, is as you stated also reportedly causing havoc in small lakes where fishing is popular. If I remember correctly, people are having to dump chemicals into those lakes to keep the water from becoming so acidic that it results in the loss of some or all the game fish.