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Not so clean

发布时间:2019-03-08 06:11:03来源:未知点击:

Britain’s plans to cut levels of two traffic-related air pollutants are being watered down. By 2005, concentrations of particles with a diameter of less than 10 micrometres were to be allowed to exceed 50 micrograms per cubic metre, averaged over 24 hours, only four times a year. This has been changed to 35 times a year. The 2005 target for hourly average nitrogen dioxide levels is also being relaxed, from 150 to 200 parts per billion. “The government lacks the will to curb traffic growth,