IT TAKES energy to produce energy. But different commercial fuels yield different amounts of energy per unit weight. Scientists at the National Productivity Council carried out an "Embodied Energy

INDIA is in "imminent danger of losing a large part of its productive lands through soil salinisation", says N T Singh of the Central Soil Salinity Research Institute in Karnal. Soil salinity is

THE FIRST all-India household survey of medical care shows some interesting results. The survey, which was conducted in 1990 in 21 states and Union territories and covered 18,000 households, found

THE LITERACY level of a country both reflects and influences its economic and social status. It also has a close bearing with a country's population growth rate. In India, the Kerala example shows

INDIA has been witnessing an explosive urbanisation. The percentage of total population living in urban areas increased from 17.3 in 1951 to 25.7 in 1991. But during 1981-91, the annual rate of urban