Processes that do not require oxygen are called

Anaerobic process

Cellular respiration requires oxygen and a food molecule such as glucose, and it gives off carbon dioxide, water, and energy. Pathways of cellular respiration that require oxygen are said to be aerobic. Glycolysis does not require oxygen, so it can quickly supply energy to cells when oxygen is unavailable.

explanation:

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.