As to the various pollutions,which of the following is NOT true?
A. In the US,many dunes have been destroyed by the use of beach buggies.
B. In the UK,many dunes have been seriously eroded by motor cycle rallying.
C. In Spain,the removal of coral for commercial sale damages coastal regions.
D. Footpaths in Snowdonia in Wales have been eroded by over-use.
