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File this under bad news for humanity's climate ambitions. The dams and reservoirs we use to harness 'clean' hydroelectric power and irrigate our crops apparently emit carbon. A lot of it. All told, man-made reservoirs release roughly a gigaton of heat-trapping greenhouse gases each year. That's more than the entire nation of Canada.
Launched in 1993, Vodafone's 2G GSM network will retire on 30 September 2017. The 2G network today is carrying less than one per cent of the company's data traffic, and around two per cent of its voice traffic -- with 4G now looking after almost 80 per cent of data traffic.