current and future problems in conserving the site. In 2007, Europe's two highest toilets (at 4,260 metres, 13,976 feet) were taken by helicopter to the top of Mont Blanc. They are also serviced by helicopter. They will serve 30,000 skiers and hikers annually, helping to alleviate the discharge of urine and faeces that spreads down the mountain face with the spring thaw. Global warming has begun to melt glaciers and cause avalanches on Mont Blanc, creating more dangerous climbing conditions. Panorama See also Exploration of the High Alps Haute Route Mont Blanc (Moon) Tête Rousse Glacier Mont Blanc massif Mont Blanc Tramway Mont Blanc Tunnel Tour du Mont Blanc Top of the Mont Blanc List of Alpine four-thousanders Notes References External links Topographic map of Mont Blanc: French IGN map, Swiss National Map (showing disputed areas) Places to visit around Mont Blanc In-depth guide to Mont Blanc Mont-Blanc summit webcam: Close up of the summit of the Mont Blanc and its glaciers at 4811m. Mont-Blanc panoramic webcam: See several points of view of the Mont-Blanc range and zoom on the top. Mont Blanc on Summitpost Descent into the Ice Companion website to the PBS NOVA program which follows a glaciologist and a climber into the glacier caves of Mont Blanc Chamonix-Mont-Blanc Map The scientific observatories on Mont Blanc. Why Is Mont Blanc One of the World's Deadliest Mountains? Mont Blanc on Peakclimber Mont Blanc Mont Blanc Mountains of Aosta Valley Alpine four-thousanders Seven Summits France–Italy border International mountains of Europe Highest points of countries