A NEW cryogenic system for industrial cleaning, using "dry ice" or solidified carbon dioxide, has been developed by Distillers MG, which is part of the German Messer Griesheim industrial gas group.

Buses in the northern and western parts of the country may soon run on a mixture of diesel and natural gas

LARGESCALE use of CNG as an automotive fuel can give breathing space to people in the heavily-polluted metropolitan cities of India. Motor vehicles are said to be responsible for 60 per cent

THIRTY years of deforestation in the temperate regions has caused more pollution than 140 years' use of forests in the tropics. When' temperate forests were cut down in the 19th century by the

Research in atmospheric sciences is booming because of the impending threat to4he world's climate. Every month there is a new study showing new sources of greenhouse gases rages that are capable of producing global warming or disputing earlier