Tiger under threat
There has recently been an upsurge of speculation about the future of the Indian tiger. The number of tigers in Indian reserves increased by 39 between 1989 and 1993. But this includes tigers in
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Deadly duo
Janalee Cadwell of the University of Oklahoma, US, has been investigating South American frogs whose poisonous secretions are used to tip arrows and darts. Her researches have led to the conclusion
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Oil right!
By reducing the number of oil changes in buses a new recycler cuts down on emissions
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Hope for the living
Documentary film maker, Doordarshan newscaster, theatre artist and radio broadcaster, Ramesh Venkataraman's latest docu-fiction video, Zindagi Umeed ke Saye Mein (Life in the Shadow of Hope), is
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A matter of costs
In a poor country, cost-effectiveness has to be the byword for municipal wastewater treatment. And the upward anaerobic sludge blanket technology offers just that. <font class="UCASE">Indira Khurana</font> examines the pros and cons of putting this
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Fact is stranger
einstein's theory of general relativity, formulated in 1915, is widely acknow ledged as one of the most elegant theories in physics. Einstein's special theory of relativity, formulated in 1905,
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The mechanism of UASB
uasb is a combination of physical and biological processes; the main feature of the former process is the separation of solids and gases from the liquid and that of the latter, degradation of
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Tusker in trouble
Poachers threaten the survival of bull elephants in Simlipal, needed for the breeding of the species and transfer of typical genetic traits
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Riven by waste
Indian rivers have been reduced to functioning as repositories of wastes rather than providers of life sustaining water
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A crisis breaks out
A pipeline burst in Thiruvananthapuram, Kerala, subjected the city s residents to a major water crisis and exposed the unpreparedness of the authorities
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Benefits of UASB
• Low space requirement • Low sludge production with quick dewatering characteristics • Lesser and simpler electromechanical parts used, leading to low operation and maintenance costs
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New vision
Iron and steel industry acknowledges the havoc it wreaks on the environment
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Veritable treat
A number of biological methods are available for the treating wastewater
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The problem with India
Why is it that this nation has had to depend on Western hand me downs?
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Farewell to fertilisers
The Netherlands position as an agricultural superpower stands threatened unless it shifts to eco friendlier organic cultivation
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Blitzkrieg against polio
Efforts to vaccinate children in eastern Africa against polio have been so successful that the region is expected to be polio-free by 2000, according to the Centre for Disease Control and Prevention
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Nigeria
The spirit of Ken Saro-Wiwa still lives on in Ogoniland and so does the spectre of Royal Dutch Shell, the petrochemicals giant. According to the movement for the survival of the Ogoni people (mosop)
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Tanzania
The king of all animals in the Serengati game reserve, Tanzania, is facing annihilation. Lions in the game reserve are dying in hundreds from canine distemper disease they contracted from pet dogs,
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Bony home
Some of the earth's strangest creatures live around hydrothermal vents
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Tracking syphilis
Did the Europeans bring syphilis with them, a venereal disease caused by infection with the bacteria Treponema pallidum , or did they catch it from the places they travelled and take it back to