The development of new neurons in humans has been documented in the and the

In humans, new neurons are continually born throughout adulthood in two regions of the brain:

·         The subgranular zone (SGZ), part of the dentate gyrus of the hippocampus.

·         The striatum; however the adult-born neurons are a type of interneuron, not a type that projects to other brain areas.[5]

In other species of mammals, particularly rodents, adult-born neurons also appear in the olfactory bulb. In humans, however, few if any olfactory bulb neurons are generated after birth.

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.