Feature Article

As the world warms, the plants that billions of people depend on for their food are likely to become less nutritious. That's the worrying conclusion of an analysis of more than 40 studies investigating how crops will react to increasing levels of carbon dioxide in the atmosphere.

More than a decade after the first commercial plantings of genetically modified crops, the same old disagreement rumbles on. On one side stand agribiotech companies, arguing that crops engineered to produce insecticidal proteins or resist herbicides boost yields in an environmentally friendly way. Opposing them are advocacy groups who charge that these crops, or the farming practices they encourage, threaten biodiversity. (Editorial)

Ariyalur, the land of fossils, is found to be embedded with rich limestone deposits. Hence around 9 cement factories have been established in and around Ariyalur. This becomes one of the source of air pollution in this area.

An outstanding climate anomaly 8200 years before the present (B.P.) in the North Atlantic is commonly postulated to be the result of weakened overturning circulation triggered by a freshwater outburst. New stable isotopic and sedimentological records from a northwest Atlantic sediment core reveal that the most prominent Holocene anomaly in bottom water chemistry and flow speed in the deep limb of the Atlantic overturning circulation begins at '8.38 thousand years B.P., coeval with the catastrophic drainage of Lake Agassiz.

Many biofuels are associated with lower greenhouse gas emissions but have greater aggregate environmental costs than gasoline.

China's economic growth in the past three decades has been the fastest among major nations, with an almost 10% annual increase in gross domestic product. However, its environmental degradation has also accelerated, and its environmental sustainability index is near the bottom among the countries of the world.

The present study was undertaken to ascertain the quality of Godavari river water.

Tank irrigation accounts for more than one-third of total irrigated area in Andhra Pradesh, Karnataka and Tamil Nadu states in India. Tank water supplies fluctuate randomly from year to year and within a year.

This paper analyses the determinants of vulnerability to food insecurity among male and female-headed households in Kwara state of north-central Nigeria.