1. Providing oxygen: Green plants absorb carbon dioxide and release oxygen through photosynthesis, providing necessary oxygen for life on earth. This process not only provides oxygen for human beings and other animals to breathe, but also maintains the balance of carbon dioxide and oxygen in the earth's atmosphere.
2. Food source: Green plants are the main food source for many living things. Organic matter produced by photosynthesis provides energy and nutrition for various organisms. For example, humans can directly eat vegetables, fruits and other plant foods, or indirectly use plants as food sources by raising animals.
3. Maintain ecological balance: Green plants play an important role in the ecosystem. They interact with other organisms to maintain ecological balance. For example, the roots of plants can stabilize the soil and prevent soil erosion; Leaves and branches of plants can provide shelter and shelter and help maintain biodiversity.
4. Cultural and spiritual values: Green plants are symbolic in many cultures and religions. They are regarded as symbols of life, hope and peace, and inspire people's awe and respect for nature and environment. In the fields of gardens, art and literature, green plants also play an important role, bringing people beautiful enjoyment and spiritual comfort.
The importance of green plants as food sources;
1, providing rich nutrients: Green plants are the main food sources for many organisms, because they can provide rich nutrients, including carbohydrates, protein, fat, cellulose and so on. These nutrients are essential for the growth, development and health maintenance of human beings and other animals.
2. Diversification of food sources: Green plants provide diversified food sources, including vegetables, fruits, grains and nuts. These foods not only have different tastes, but also have different nutritional values, which help to meet the dietary needs of different organisms.
3. Economical food source: Green plants are a relatively economical food source. Compared with animal food, plant food is usually cheaper and easier to obtain. This enables many people to get enough food at a relatively low cost.
4. Sustainable food source: Green plants are a sustainable food source. Plants can grow by using solar energy and carbon dioxide through photosynthesis, without a lot of land and water resources. In addition, plants have a short growth cycle and strong reproductive ability, which can continuously provide new food sources.