What are ferns?

Pteridophyte is a kind of seedless vascular plant which does not bloom It has many kinds and spreads all over the world In addition to the wild, there are also artificial ferns for ornamental purposes In addition, some fern varieties are also a good source of human food Fern is one of the oldest vascular plants Vascular plants have a complex vein network, which is used to transport water and oxygen during plant growth The evolution of vascular plants, such as ferns, is an important step in the historical evolution of plants, because it transforms plants from algae and small undifferentiated structures to flowering plants and trees Recognizable ferns first appeared millions of years ago Pteridophytes were especially dominant in the Carboniferous, and most of them were in the form of giant tree ferns After plants die, they protect their roots and nourish the soil, providing ideal conditions for other plants to grow After hundreds of years of compression, these plant sediments are transformed into crude oil and become the source of petrochemical products and fuel for modern human needs Many plants have the function of purifying air quality, which can help to filter out harmful chemicals and improve oxygen content Apartments and small rooms are particularly suitable for ferns because they do not require much maintenance and are easy to grow in different climates, so they are good for maintaining air quality NASA was the first agency to study the role of plants in purifying and maintaining air quality In the space lab program, NASA began to look for inexpensive plants that are easy to maintain, such as ferns, and can keep the station air fresh In addition, various houses can also use these plants to absorb harmful chemicals in the air and fix them in the soil to reduce the harm Although it has been known for a long time that plants can absorb carbon dioxide and release oxygen during photosynthesis, it is only in recent centuries that they have other benefits than increasing oxygen levels It has been proved that these plants can effectively absorb trichloroethylene, benzene, formaldehyde and other common pollutants.