In the documentary Earth: The Operators Manual, our dependence of fossil fuels is explained as well as how much CO2 is actually caused by humans. In this documentary, the viewer comes face to face with the reality of our planets climate change and how there isn't really anyone to blame but ourselves. Our need for energy and the lifestyle we have, has created the climate change problems we are going through now.
Relating this information to The Road, maybe the reason there is an apocalypse in the story is because we completely ran out of fossil fuels and along with the change in temperature, a lot of natural disasters were created the changed human life. Everything that was being predicted in this documentary can't say what will happen later on but it does push for humans to find alternative ways of energy. By completely losing our dependence on fossil fuels or at least, depending them less, we can ensure a future to the next generations so that they don't have to live in a gray world where cannibals could eat them. A clear example of the benefit of renewable energy was the militaries initiative to become more eco friendly in all the fronts since they are actually the highest gasoline consumers in the United States and if they can take a step back and analyze the future to provide safety, we can take a step back to ensure a future.
