This statement is false, because in these trips there is a lot of collaboration between countries interested in space missions, and there is cooperation in the design and construction of the ship that will be sent to space. A simple example is the International Space Station, where astronauts from all over the world coexist and carry out joint research on space and other planets or interplanetary phenomena.
The only way for gases to diffuse in and out of the leaf is though small openings on the underside of the leaf, the stomata. The stomata can open and close
