pathogen can be
defined as a micro-organism that has the
potential to cause diseases and they have the ability to produce toxins which
the body and colonize, hijack nutrients and thereby immunosupress the host. Furthermore,
pathogenesis is simply the mechanism of infection and the mechanism by which
the diseases develop in the host.
Once entering the atmosphere the heated up water vapor (that's the process of evaporation) cools back down (the atmosphere is cooler than the Earth you see). it makes clouds Their it will condense until it's heavy enough to fall to Earth as precipitation!
