A third cause of global warming is about pet. According to New Zealand-based researchers Robert and Brenda Vale (CATHAL KELLY, feature writer The Toronto Stan) said that a great many household pets chew up more resources than a lot of cars. According to their figures, “feeding a medium-sized dog for a year has twice the environmental impact of driving a luxury SUV for 10,000 killometres”. It means that a dog’s food in a year is equal to a person’s food consumption. Vale said that “if a person want a big dog, maybe he or she should be a vegetarian and take the bus” (Brenda Vale from The Toronto Stan). This cause is related to the second cause eating meat. Some pets only eat meat, so it is impossible that let those pets be vegetarians. Therefore, Vale advices that people should limit themselves to eco-friendly, vegetarian pets, like hamsters or rabbits (Brenda Vale). So people can image that pet’s food consumption is an amazing.