2011 was a big year for green news.
In energy news, the proposed Keystone XL pipeline and the Canadian tar sands oil that it would deliver made news as environmentalists and residents of Nebraska spoke out against the pipeline. Fracking, a method of underground natural gas extraction, raised concerns from citizens worried about groundwater contamination near fracking operations in the western and northeastern U.S.
Animals also made the news, but often for tragic reasons. Police in Ohio were forced to shoot 48 rare and exotic animals after an exotic animal farm owner released them and committed suicide. Several gruesome animal attacks also showed how human intrusion into animal habitats can have deadly results.
Which news story will you most remember from 2011? Vote in the slideshow and share other news stories with us in the comments below.
For more on the best of 2011, visit bestof2011.aol.com.