Not all plants release oxygen at night. The plants that release oxygen at night are: cactus: cactus ball, cactus mountain, cactus column, measuring the sky, crabapple orchid, Haohua, arrow, white sandalwood, etc. Sedum family: the Sedum, Sedum Sanchi, Fei Cai, swallow palm, jade lily, stone lily, etc., tiger orchid genus: tiger orchid, and agave, gold-edged agave, aloe vera, dragon’s claw, crabapple palm, raw stone flower, fallen roots, Ji Bromeliad, showy Chinese iron orchid, winged silk orchid, dwarf galanga The total number of species is more than 300. The photosynthetic pathway of these plants is different from the general plants, they open their stomata at night, absorb carbon dioxide and store it, and release it during the day for photosynthesis, this phenomenon was first discovered in the Sedum family, so this photosynthetic pathway is also known as the Sedum family photosynthetic pathway. The following information is provided by the members of the Green Leisure Flower Club: Flower experts have found that indoor flowers, because of the night flowers will release carbon dioxide and pollute the air, which is not conducive to human health; but in the indoor cactus plants, but can make the indoor air in the negative ion increase, beneficial to health. Cactus originally grew in the deserts and semi-desert areas of America and Africa, where the hot and arid environment caused it to change its structure and growth pattern. Its stems become succulent and juicy, storing large amounts of water; its leaves shrink into needles to reduce evaporation of water hair. In this way, the cactus can continue to grow even in extremely dry conditions. Why is it good for health to grow cactus indoors? Because cactus can increase the negative ions in the air, making the air especially fresh; in addition, cactus, in order to adapt to the dry and hot climate of desert areas, closes its stomata during the day to avoid water evaporation, and opens them at night to absorb carbon dioxide and exhale oxygen. So in the living room with cactus, cactus ball, for the improvement of the air quality of the room is very good. In addition, cactus can also be used as a medicinal herb: the fresh product to remove the thorns and mash can be applied externally to treat mumps, mastitis and boils and carbuncles; pounded juice can be applied externally to treat fire wounds; decoction can be used to treat gas pain, acute bacillary dysentery and other diseases. There are four kinds of plants that release oxygen at night: 1, hanging orchids 2, immortal species 3, the sky class 4, aloe vera These four types of plants do not compete with humans for oxygen at night, is a good friend of mankind, the night can be placed in the bedroom with confidence