It takes roughly 500 gallons of water to produce a quarter pound hamburger, and in the process, approximately six pounds of greenhouse gases are released into the atmosphere.
Sea otters are the largest members of the weasel family. When people started hunting sea otters for their fur, their population fell from roughly 225,000 to about 1,500, until the International Fur Seal Treaty took effect in 1911. Since the international ban on otter hunting, the population has rebounded back to roughly 107,000.
When subjects are asked to watch a movie and not display emotions (say, a comedy without laughing, or a tearjerker without crying), they evidently use up glucose in particular areas of their brain in a way that subjects who are free to react however they want do not.
Numerous studies have shown that people are over-confident in their own abilities. Most people, for example, think that they are better drivers than average.
In an office area, there is a coffee machine and a jar in which people are asked to put voluntary contributions for the coffee they consume.
People were shown a bunch of writing purporting to make various claims about facts about the world, then were asked later which facts they believed.
Evidently, when you are thinking about a problem, you use up glucose. This can be seen by monitoring blood glucose as people work on math problems and the like.
An experiment was run by Walter Mischel with four-year-olds back in the 1960s. Each child was brought into a room in which there was an Oreo cookie. The child was told that s/he could have the Oreo right then and there—or if s/he waited 15 minutes, could have two Oreos instead.
Dopamine is a neurotransmitter that motivates us to engage in rewarding activities such as eating and sex. Animals without dopamine stop eating and starve to death.