 It is not only global warming that is destroying the Himalayan paradise (" Climate change may leave Mount Everest ascent ice-free", 25 September); tourists from Pakistan, India, China and Russia are also bringing pollution to these heights. But nothing is so damaging as the Indo-Pakistan war on the longest and most spectacular mountain glacier in the world: the Siachen.  The two countries have been at war since 1984 on this highest and coldest of battlefields. Thousands of soldiers are encamped on the glacier. The detritus of war, the garbage and human waste produced by so many men on the ecologically fragile mountains is beyond belief.  a ceasefire has been in force since 2003 but several attempts at a settlement have foundered on mistrust and on the touchy issue of honour. a solution would be to establish a trans-boundary nature park. as the area has no resident population, a Siachen peace park would be relatively easy; it would also eliminate the need to argue about a frontier. Honour on both sides would be enhanced and what a fitting tribute it would be to the many men who have sacrificed their health and their lives. The massive pollution would end and at least some of it could be cleared. and the sia (the wild rose) would return.  aamir ali  Geneva