What is the cosmic role of plants?

1) photosynthesis helps to reduce the concentration of carbon dioxide in the atmosphere
2) photosynthesis provides the synthesis of organic substances, and therefore food for all living organisms
3) in the process of photosynthesis, oxygen is formed, which is necessary for the respiration of all living organisms
4) oxygen is involved in the formation of an ozone shield that protects organisms from the harmful effects of UV radiation.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.