Blue and Green: Former US secretary of state Hillary Clinton has called for increased investment in renewable energy to achieve a clean energy future and address the threat of climate change.
Speaking at the National Clean Energy Summit in Las Vegas on Thursday, Clinton -- who has been tipped as a likely Democrat candidate for the 2016 presidential election -- warned of the risks of unabated greenhouse gas emissions.
"Sea levels are rising, ice caps are melting, storms, droughts and wildfires are wreaking...