Angela Merkel's image as the environmental conscience in global politics has this week taken a drubbing from activists who claim her energy policies are unrealistic and hypocritical.
Siberian tiger populations were recovering. Now logging, poaching and a lack of interest from the Russian government threatens to decimate the big cats. Richard Grant went on anti-poaching patrol.
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.