Freshwater basins are vulnerable to human-induced change for a number of reasons. The change detection study of Ansupa lake, Orissa was carried out by using multi-temporal satellite data clearly indicates the decrease in wetland area. Due to high anthropogenic pressure, the wetland is shrinking day-by-day.

The Veli lake is the smallest among the backwaters of Kerala. The partially treated sewage and the completely untreated industrial effluents are the main sources that brought undesirable changes in the lake. For the present study three stations were fixed in the lake to test the physicochemical features (April 2000-March 2001). 2007

The influenza virus can survive for thousands of years in frozen lakes and might be picked up and carried by birds to reinfect animals and people. After their release, these viruses can cause new

Water from the Guanting reservoir, Beijing's fourth largest drinking source, was not fit for human consumption or irrigation during the month of October, the Chinese capital's environmental