New York City, USA Mayor Michael Bloomberg announces plans to end the use of heavy oils for heating buildings by 2030 in an effort to reduce greenhouse gas emissions and improve the city’s air quality.
http://manhattan.ny1.com/content/top_stories/137760/mayor-goes-after-dirty-heating-oil-in-planyc-update http://news.yahoo.com/s/ap/20110421/ap_on_re_us/us_green_nycRegional experts state that the dying of hippos around Lake Sonfon in northern Sierra Leone, where one to two perished baby animals are being found daily, could be caused by illegal gold mining in the conservation area which is destroying the flora and fauna of the lake.
http://www.france24.com/en/20110421-gold-mining-blamed-hippo-deaths-sierra-leonehttp://www.dailytelegraph.com.au/mines-blamed-for-baby-hippo-deaths/story-fn6e1m7z-
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