i be give this film positive only because there aren not enough specific scientific reference to the amount of energy it take to produce food to satisfy the science hater . mdixon seem to believe the admittedly biased commentator be make this stuff up and but even an elementary understanding of resource and the law of thermodynamics will indicate that at the very least and they be on solid scientific ground when they state that we can not continue to depend on oil and we must transition to different type of energy and and do not have a plan that will replace the amount of energy we get from oil . other civilization have refuse to face the fact of life and and have perish . read jared diamond collapse which be a popular book and or any elementary ecology or earth science textbook and you can verify the basic premise of this movie . go ahead and fiddle while rome burn .