Grass is a type of plant that belongs to the family *Poaceae*. There are more than 10,000 species of grass worldwide, and it can grow in almost every habitat on Earth. It is one of the most common and widespread plants on the planet. Grass has narrow leaves that grow from the base of the plant, and most grasses grow from the bottom up, which helps them survive grazing animals.
Lawns, meadows, and savannas are mostly made of grasses. Grass is the main food source for many herbivores, like cows and horses. Humans also eat grains that come from grasses, such as rice, wheat, and corn. Grass helps prevent soil erosion by holding the soil with its roots. It absorbs carbon dioxide and releases oxygen, helping clean the air we breathe. Grass also provides shelter and homes for many insects and small animals.
Bamboo, one of the fastest-growing plants on Earth, is actually a type of grass. Some grasses can grow up to three feet tall, while others stay very short. The color of healthy grass is