web | Clayton Aldern, Grist | Reader Supported News | 2015-09-09 | |
web | Richard Heinberg | Post Carbon Institute | 2015-03-27 | |
web | James Magnus-Johnston | Daly News | 2014-10-31 | |
web | Ralf Seppelt, Ameur M. Manceur | Ecology and Society | 2014-01-01 | |
web | P. K. Haff | Duke University | 2013-01-01 |