A recent report from American University communications professor Matthew Nisbet examined the apparent decline of the environmental movement in recent years. For all the questions raised by the report over what happened to the moment, it does answer a pair surrounding the debate as it pertains to bias in the media.
First, the media was a force for, not against, liberal environmental policies. That will likely shock no NB reader, but many on the left are still convinced that the media is a force for conservatism, or at the very least against leftist political change (stop laughing). The AU report undercuts those claims, at least as they pertain to the environmental movement.
"[T]he major national news organizations overwhelmingly reflected the consensus view on the reality and causes of climate change," Nisbet concluded in his analysis of media coverage. The "consensus view," in this context, refers to the view that climate change is occurring and that human activity is responsible for it.