InsideClimate: In both the United States and Canada, activism against tar sands, pipelines and climate change has soared in recent years.
But while President Obama has encouraged citizens to "stand up and speak up" to demand change on energy, Canadian Prime Minister Stephen Harper's administration has tried to silence critics of pro-tar sands policies.
In the most recent evidence, seven influential environmental organizations have become the subject of rigorous audits by the Canada Revenue Agency.
Activists...