Putting up a small wind turbine on the roof of a suburban home may be a waste of time, according to a new report published by the Carbon Trust and the Met Office.
The elusive Purple Emperor, arguably the most magnificent British butterfly, prefers tree-tops to flowers, so you might need binoculars to see this spectacular creature, says Peter Marren.
The Pulse tracks what's hot in global coverage of green issues, displays the number of stories published in each area and ranks by percentage weekly change.