The answer is a production of spores which are used for reproduction.
In fungi, the fruiting body contains spores, which are the fungi's reproduction units. Spores are released by wind, rain, or animals. Once they land on an adequate surface they grow into hyphae, and eventually form a mycelium. The mycelium can later develop into the fruiting body and, thus, the cycle is repeated.
Smog. Im pretty sure smog is the only unhealthful air pollution on this list.
<span>When cells divide uncontrollably it causes things like mutation or cancer. This is because cancerous cells go through rapid cell division. They do not develop in the same way that healthy cells develop. </span>
Chromosomes; chromosomes can mutate during the creation of the next generation with semen and the egg.
Heat convection is a mode of heat transfer by the mass motion of a fluid such as air. Heat convection occurs to the surface of an object where the surrounding fluid of object is heated and moved energy away from the source of heat.