Stomata,
the pore like openings in a leaf.
gases pass though them.
A Trombe wall (Trombe rhymes with prom, by the way) is a wall that warms trapped air, and then circulates it to help heat a house. Trombe walls are ideally made out of a material with a fairly high thermal mass materials (like bricks or concrete), and are often painted black to improve heat conduction
the answer is Natural energy resources are nonrenewable and are being depleted.
Smoking is a huge factor that drives this disease, specifically tobacco.
Phages are a positive use of viruses
