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Will Kolkata succeed in phasing out two-stroke autos by July end? two-stroke and non-lpg (liquefied petroleum gas) four-stroke autorickshaw will not be allowed to ply in Kolkata from August 1, the Calcutta High Court has ordered. The city has around 38,000 registered two-stroke autorickshaws running on petrol; 30,000 of them are illegal. With six weeks left for the deadline, 20,000

Calcutta High Court on Friday gave Modern High School for Girls the green signal to run five buses more than 15 years old, provided they meet the emission standards, setting what the green lobby saw as a dangerous precedent in the fight against vehicular pollution.

Elisabeth Rosenthal

A study of monkeys suggests that people could in principle extend their life span by following a calorie-restricted diet

The government is making a hush-hush move to give two-stroke autos an escape route.

The writ so far, ruled by court pressure, was to scrap all polluting two-stroke autos and allow only four-stroke single-mode LPG ones to ply on city streets.

Atmospheric aerosols (a mixture of solid or liquid particles suspended in the air medium) are short-lived, with a residence time of about a week in the lower troposphere. Unlike the principal greenhouse gases, aerosols are more concentrated in the source regions and exhibit strong spatial and temporal variations.

The transport department has decided not to renew the route permits of commercial vehicles 15 years and older as part of the first concerted attempt with the environment department to implement the court

The world

CHENNAI: The level of total suspended particulate matter (TSPM) in the ambient air at a traffic intersection in Vallalar Nagar during the 24-hour period ending 6 a.m. on Tuesday was 312 microgram/cubic metre. The permissible limit is 200 microgram/cubic metre.

Tiny particles from traffic are known to cause bronchitis and asthma, killing thousands. But that is not all. Simply living beside a busy road can be fatal. Particles in vehicular exhaust can stick to lungs, endanger health, lead to joint pains and trigger infertility, writes Priyanka Chandola

Washington:A team of scientists is working on a new generation of eco friendly pyrotechnics that produce less smoke and use fewer toxic metals. Fireworks are fun and exciting, but the flashing displays can harm the environment and pose risks to human health.

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