The Earth provides a living environment for life species, determining their evolutionary status and direction, but the emergence of life species has also changed certain aspects of the Earth's state. 1. The earliest carvers on Earth were fungi, and some archaeal species were responsible for the biogenesis of methane, a greenhouse gas that can warm the climate. 2. Blue algae can carry out photosynthesis, converting carbon dioxide and water into organic matter while releasing oxygen. It is the presence of oxygen that has inspired the evolution of other forms of life. The emergence of oxygen leads to the formation of the ozone layer, which protects the Earth's surface from the most harmful rays of the sun. The existence of this layer fundamentally changes the environment in which life forms subsequently evolve on land. The ozone layer is the protective umbrella for life on Earth because it absorbs harmful ultraviolet radiation from the sun. The five large-scale mass extinction events that have occurred on Earth, although the causes of extinction are different, have occurred during disasters.
