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Chinese citizens exposed 131 environmental offences via an official hotline in May, according to the Ministry of Environmental Protection.
In May, 163 tip-offs were called in to the hotline and handed over to local environmental protection departments for investigation.
A large majority of the complaints concerned air quality - 84 cases, or 64 percent of all notifications. Misconduct during various project approval stages precipitated a further 51 complaints.
In terms of location, 39 cases occurred in north China's Hebei Province, one of the country's most seriously polluted regions.
Punishment, ranging from fines or relocation through to forced closure, have been meted out for most of the violations, said the statement, without offering details of specific cases.
Weekly selection of world photos (Aug.19-Aug.24)
Army aviation brigade in actual-troop drill
Top 10 Chinese provinces for the well-heeled
Baby born to save his sister - the story of a savior sibling
Lady of mystery: Female SWAT team in prison disclosed
Single mother, baby live in KFC restaurant for months
Fan Bingbing poses for Malaysian magazine Citta Bella
Zhang Xinyi covers COSMOPOLITAN
A collection of bizarre rooftop buildings around China
100th birthday of 'Little Mermaid'
China, U.S. conduct joint anti-piracy drill
'Abandoned' life in cement boats in Huai River
2013 Taiwan Int'l Tourism Expo kicks off in Taipei
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Nokia's Global Headquarters: visiting a declining empireDay|Week|Month