News24: Activists are stepping up pressure on US President Barack Obama to issue concrete plans to battle climate change, with a major rally planned in Washington following his annual address to Congress.
More than 100 groups are planning what they hope will be the largest rally in the US on climate change, with organisers saying that tens of thousands will descend on the National Mall with buses coming from 28 states.
The demonstration comes after the US in 2012 experienced record high temperatures,...