IANAS, but my understanding is that plants leaves are porous, they interact with and exchange gas with the environment. It's one of the things they are most kno

IANAS, but my understanding is that plants leaves are porous, they interact with and exchange gas with the environment. It's one of the things they are most known to do. http://www.biology-pages.info/G/GasExchange.html http://www.biology-pages.info/G/GasExchange.html