Gaia hypothesis

The Gaia hypothesis is an idea that Earth’s natural systems work together to create a livable environment for living things - like a big, living thing. It means that living things like plants and animals help the environment by keeping it healthy. They give off oxygen that we need to breathe, they help keep soil healthy and they help regulate the climate. The Gaia hypothesis also says that living things have been doing this since the Earth formed, and this has helped to keep the planet liveable.