A Heart in Nature (2017)

People are not responding to environmental problems because they fail to see how their actions on a daily basis impact the planet. This is what led Charles Darwin's great-great-grandson, Chris, to literally become the change he wanted to see in the world. He has not flown for 2.5 years and to monitor his environmental impact, he measures almost everything he does, except for breathing. From travel and food to anything he buys and rents. He has gone a long way to learn to love the planet. His next big mission is to learn to love others and then the final Everest would be learning to love himself, which may be the hardest.