A BBC team has entered a remote region of Russia normally closed to foreigners that produces almost half the worlds supply of palladium-a precious metal vital for making catalytic converters,it is accused of being the worlds biggest producer of acid rain.

http://news.bbc.co.uk/1/world/europe/6528853.stm

Hmm.. i didn't know it is now open for foreigners.
Anyway that is Norilsk, it has always been industrial city and one of the most polluted in Russia. They are lucky they live above the arctic circle, or it would be really intolerable. That BBC team had to visit south-eastern Moscow near oil processing plant - that is a real disaster.. :@@:

Dee.Why is movement of foreigners still restricted in Russia,is there more enviorimental disasters hidden around the country.

Everything about Russia is hidden. (Unless it's new weapons technology, that is.)

Dee.Why is movement of foreigners still restricted in Russia,is there more enviorimental disasters hidden around the country.
It is not restricted. There are just some cities in Russia (closed administrative-territorial formations) which can not be visited even by russian citizens. 26 known cities are closed for both russians and foreigners, they all are concerned with nuclear and military technology. Some of them are port cities with docks for submarines. In others - there are institutes, research centers, WMD production or recycling centers. These are traditions of Soviet Union - the measure of protection from espionage. Well just like Los Alamos.

Not to mention Russia is massive which makes it easy to hide stuff.

That's why those cities are mostly in Siberia.