How virtual bitcoin production is 'killing the planet'

Existing only in the digital sphere but currently worth a fortune, it is the virtual currency that has gone mainstream in recent weeks.  However, it has emerged that the production of bitcoins uses so much energy it threatens to seriously harm the planet. In recent months investors have flocked to the currency that exists only in cyberspace and is traded directly from person to person. But its very success had led to fears about the environmental impact of the Bitcoin phenomenon. The proces