Please, check these sentences

It's me again .

First sentence: "Acid rain" is caused by destrucrive airborne acidic pollutants;

Second sentence: Acid rain was discovered in 1852 when the English chemist Robert Agnus invented the term;

Third sentence: Recently, a more intensive research on the true causes of acid rain has been done, so that countries have the information they need to prevent acid rain and its dangerous effects;

Fourth sentence: Air pollution can be found both outdoors and indoors;

Fifth sentence: Every year, 14 billion pounds of wewage, sludge, and garbage is dumped into the world's oceans.

I hope they are correct

Thanks!!