1. Acid rain is not straightforwardly attributable to the burning of coal.
2. Nor is acid rain always, and universally, a bad thing.
3. This comedy of contemporary manners is told with compassion and acid humour.
4. The somewhat acid flavour is caused by the presence of lactic acid.
5. Iron and folic acid supplements are frequently given to pregnant women.
6. His stomach might rupture from all the acid.