Shishir Prashant / New Delhi/ Dehra Dun May 03, 2010, 0:27 IST Gangotri, Valley of Flowers and other highly eco-sensitive zones of the Garhwal Himalayas in Uttarakhand may be becoming hot sites on the tourist map. But the Uttarakhand government now wants to put up more restrictions on travellers in order to protect the precious biodiversity of the Himalayas, including the glaciers. According to a rough estimate, thousands of pilgrims, who visit the hill state during the Kumbh, Chardham and Kanwar and other religious congregations, travel to these areas leaving heaps of non-degradable waste, including plastic, which are hazardous to environment. After the Centre decided to ban two key hydropower projects