Human activities are releasing tiny particles (aerosols) into the atmosphere. These human-made aerosols enhance scattering and absorption of solar radiation. They also produce brighter clouds that are less efficient at releasing precipitation. These in turn lead to large reductions in the amount of solar irradiance reaching Earth's surface, a corresponding increase in solar heating of the atmosphere, changes in the atmospheric temperature structure, suppression of rainfall, and less efficient removal of pollutants.

Safety issues regarding Brazil's controversial nuclear power programme came into focus after a local magazine recently reported a four-month-old nuclear plant accident, which was not made public by

The Brazilian government is planning to declare aids a national emergency. The country's health minister, Jose Serra, said the decision was made after negotiations to lower the price of

Cairo embraces CNG in a big way

The Brazilian government has decided to export ethanol. "Brazil has got all the competitive advantages necessary to become a major supplier of the green fuel,' said Alcides Tapias, the country's

Brazil is planning to expand its nuclear energy generating capacity, in the wake of an acute energy crisis (see Down To Earth , Vol 10, No 4, July 15, 2001, p13). Government officials say that

WTO's conundrum: cheap drugs for poor countries or protecting North's business interests

Petrobras, the state-owned oil group of Brazil, has completed investigation into the sinking of its biggest offshore oilrig, which many say is a cover-up operation. Ten workers had died and a few

Africa's first consignment of cheap generic antiretroviral drugs for treating AIDS was given to Kenya's Nyumbani Orphanage on June 12, 2001. "It's the beginning of the flow of medicines that have

Brazil has raised the ethanol content of petrol from 20 per cent to 22 per cent from May 31, 2001. Ethanol, which can be produced from molasses

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