1.   How important is land use compared with deposition of strong acids derived from the combustion of fossil fuels?

2.   ECOVER toilet cleaner does not contain strong acids like phosphoric acid or hydrochloric acid, the basis of most toilet cleaners.

3.   Counterintuitively, perhaps, what makes hydrofluoric acid so deadly is not that it is a strong acid.

4.   More tellingly, microscopic examination of the shells reveals marks characteristic of etching with strong acids, which would have happened in the guts of creatures that swallowed them.

5.   Strong acids and bases react violently.

6.   They then shortened the tubes and opened their ends by immersing them in strong acids.

7.   It is stable to heat, air and moisture, but is destroyed by strong acids, alkalis and light.