It is now a well-established fact that there is a link between human meat consumption and climate change, thanks to the CO2 and methane emissions that come from raising and transporting cattle and pigs. Since pets are responsible for 20 percent of global meat consumption, some pet food manufacturers are turning to insects instead of beef to make their products. According to the BBC, one pet food manufacturer says that 40 percent of its new product is made from black soldier flies, which are an excellent source of sustainable protein.