Follow On: Dogs are often able to develop a disease known as canine oral papilloma, also known as oral warts. Papillomas are small tumors that are caused by a virus, but they are almost always benign. In puppies, the oral papilloma virus shows up as small patches of what look like cauliflower.
The word earth is from the Old English eorthe, and derived from Proto-Germanic ertho. It is also related to the Old Saxon ertha, the Dutch aerde, and the German erda. The word earth is from the Old English eorthe, and derived from Proto-Germanic ertho.
How do trees give earth all its oxygen? All of earth's oxygen does not come from trees. Rather, the atmospheric oxygen that we depend on as humans comes predominantly from the ocean. According to National Geographic, about 70% of the oxygen in the atmosphere comes from marine plants and plant-like organisms.