*Ebell, Myron; Milloy, Steven J. (September 18, 2019). [https://cei.org/blog/wrong-again-50-years-failed-eco-pocalyptic-predictions Wrong Again: 50 Years of Failed Eco-pocalyptic Predictions]. ''Competitive Enterprise Institute''. Retrieved November 3, 2019. | *Ebell, Myron; Milloy, Steven J. (September 18, 2019). [https://cei.org/blog/wrong-again-50-years-failed-eco-pocalyptic-predictions Wrong Again: 50 Years of Failed Eco-pocalyptic Predictions]. ''Competitive Enterprise Institute''. Retrieved November 3, 2019. |