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- Health ministry sets timeframe for keeping animals treated with antibiotics out of food chain
- Gujarat pollution board gets a makeover in efficiency 33
- India's genome saviours
- Illegal GM cotton spreads across India
- Auroville’s alternative galaxy 2
- In celebration of biodiversity 5
- CSE volunteer barred from filming public hearing for Ultratech cement plant
- Chaos in the iron age 4
- Become iron woman, eat veggies
- Kicking up a stink 4
- Environment ministry wants to restore night traffic through Bandipur tiger reserve 52
- A green facade 44
- Diesel: when bad policy makes for toxic hell 38
- Gujarat pollution board gets a makeover in efficiency 33
- What’s good insulation? 30
- How vulnerable are India's nuclear power plants to disaster 28
- Grand distraction called river interlinking 28
- Eat at your own risk 27
- Green energy takes toll on green cover 26
- Temporary solution, permanent jam 25
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Science & Technology
Artificial rain
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Issue Date: Oct 15, 1997
A technique to produce unnatural rain is being worked out in Mexico by researchers at the National Center for Atmospheric Research in Boulder, Colorado, USA and several universities in Mexico. They are using pyrotechnic flares mounted on aircraft to seed clouds. The craft flies along the surface of cloud so that the moisture-retaining particles released by the flares could rise into the cloud. When the water vapours in cloud come into connection with the particles, these are formed into droplets that fall as rain ( Popular Science , Vol 251, No 2).
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