Two drinking water lakes of Hyderabad - Osman Sagar and Mir Alam, were studied for their chemistry for two years (1977-78). Mir Alam, the older of the two, showed higher silicate content. Dissolved component formed 91-27% of the total silicate content in these lakes.

A great concern over genotoxic potential of environmental chemicals has been expressed in recent years. Endosulfan a polycyclic chlorinated hydrocarbon of cyclodien group, is a well known insecticide. It is widely used in agriculture and, in some countries, in public health.

The mid-canal of Kandy, a 8-km effluent canal that runs through the city, collects massive quantities of domestic, municipal, and agricultural waste products. In this study, 37 samples from canal water and 13 from nearby drinking water wells were analyzed for their total Pb, Cd, V, Fe, and ferrous ion content. The following average values for the canal water were recorded: Pb, 269 μg/liter; Cd, 138 μg/liter; V, 18 μg/liter; total Fe, 4 mg/liter. These values indicate the relative levels of metal input from the effluent sources of the city of Kandy, the second largest city in Sri Lanka.

The traditional Indian strategy of resolving conflict by non-cooperation, the satyagraha, has been revived in the Chipko, or "Embrace the Tree", the movement to protect trees from commercial felling. This paper traces the development of the philosophy and the non-violent resistance activities from the beginnings of Chipko in the early 1970's in Garhwal to its present role throughout most of India. It is unique in that it is based not on the politics of the distribution of wealth but on that of sustainable ecological stability, and it is dominated by women.

When India and other nations convened the U.N. Conference at Stockholm in June, 1972, it marked a new epoch in international concern for the environment. India was among those nations representing to the call for a cleaner environment. However, India's environment has improved very slowly since 1972. In this article, we will point out several weaknesses in India's statutory scheme for environmental protection.

Using data from villages in three districts of Western Rajasthan, this paper describes the decline in area and deterioration in quality of common property resources over three decades. The decline of common property resources is associated with institutional changes in the villages.

The water resources of a Miocene limestone aquifer in northwest Sri Lanka were investigated. The limestone aquifer receives recharge although it is buried beneath a thick sequence of Quaternary deposits of low permeability which cover the whole basin. Hydrochemical and pumping-test data show that this recharge occurs as leakage through the semi-permeable cover.

The important attributes of macrobenthic community structure viz., species composition and number, population density, biomass, and dominance and diversity indices were measured at different depths and discussed in relation to pollution of Lake Naini Tal. The zone below 7 m depth, where anoxic conditions prevailed for most part of the year, showed complete absence of macrobenthos.

Porpax Lindi. is a small genus found only in the mainland of Asia. It differs from its close relative Eria Lindl. in having the sepals joined into a tube and having a very short pseudobulb which is wider than long. While on an exploration to Silent Valley a curious population of Porpax was located. Comparing with other known species of the genus, the plants were described here as a new species. The plants were growing on lichen covered tree trunks in moist shady places.

Indian Prime Minister Indira Gandhi takes a keen interest in the development of her country's science and technology. Here, she talks to Anil Agarwal