Can green plants really regulate the climate?

Yes, the influence of green plants on local microclimate is mainly reflected in the influence of temperature and humidity. The trunk and crown of green plants can reflect and absorb solar radiation heat energy. In hot season, part of solar radiation heat is absorbed by dense canopy for photosynthesis and water evaporation, so the temperature of green space is 3 ~ 5℃ lower than that of non-green space and about 10℃ lower than that of areas with buildings. Green plants refer to non-unicellular plants containing chlorophyll. It can generally be understood as green plants. Chlorophyll in leaves and stems of green plants can carry out photosynthesis, and its essence is to release oxygen and energy when converting carbon dioxide and water into sugars.

In order to consume oxygen and exhale carbon dioxide, animals must rely on green plants for photosynthesis to maintain the balance of oxygen and carbon dioxide in the earth's atmosphere. Most of human food comes directly (food, vegetables and fruits) or indirectly (meat) from green plants. Oil, coal and natural gas, which account for the vast proportion of human energy, also mainly come from ancient green plants. Wood is used to build our living room, cotton and flax are used to make our clothes, and many plants can also be directly used as medicine or extracted from it. In short, people's lives are absolutely inseparable from green plants.

The study of geological history shows that the ancestors of many green plants living on the earth are cyanobacteria. It is the earliest green plant on the earth. The earliest known cyanobacteria fossils were found in ancient sedimentary rocks in South Africa. This is evidence that there was life on earth 3.4 billion years ago. The appearance of ancient cyanobacteria is somewhat similar to that of modern cyanobacteria.