interact verb [I]. âº to âcommunicate with or âreact to each other: He does not interact well with the other âstudents. interaction noun [C/U] us /ËÉªnÂ·tÉrËaekÂ·tÉrËÃ¦k/ âº [ÊÉn] âc drug. interactions [Noun/C] u /usÂ·ËÉªnÂ·tÉrËaek/. tÉrËÃ¦k ÊÉn
Scientists estimate a safe oxygen consumption of 50 liters per hour for a human. Meanwhile, a leaf gives off about five milliliters of oxygen per hour. A person would need to be in a room with about ten thousand leaves. About 300 to 500 plants would produce the right amount of oxygen.
Plants provide food to people and animals, regulate the water cycle, create oxygen and provide a habitat for other species. Without plants, life on Earth would not be sustainable for most species, including humans. In addition to regulating the water cycle, plants also help purify the planet's water, which is important to sustain life. Plants and trees create oxygen through a process called photosynthesis. A decrease in plants and trees means a decrease in oxygen, which humans and other species require in order to breathe. These things aside, plants are also used for medicinal purposes. Many plants have healing properties, and one-quarter of prescription drugs come from plants.