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.
Trees clean the air. Trees absorb odors and pollutant gases (nitrogen oxides, ammonia, sulfur dioxide and ozone) and filter particulates out of the air by trapping them on their leaves and bark. Trees provide oxygen. In one year an acre of mature trees can provide enough oxygen for 18 people. Trees cool the streets and the city. Average temperatures in Los Angeles have risen 6Â°F in the last 50 years as tree coverage has declined and the number of heat-absorbing roads and buildings has increased.