Weekly environmental news, May 26 - June 1

Sediment cores show Arctic climate was once subtropical [Reuters]
Belgium to build first renewable energy Antarctic base [Reuters]
E.U. launches global warming awareness campaign [ENN]
Africa to create green fund [Reuters]
Higher energy costs fuelling research [CNN]
More potent poison ivy with climate change [Reuters]
Himalayan forests and species at risk [National Geographic]
China's Yangtze River rapidly dying [Reuters]