Wildlife conservation, endangered species, in situ and ex situ conservation1.
Pollution (air, water, soil), deforestation, global warming, ozone depletion1. PollutionPollution is the contamination of the environment by harmful substances, affecting air, water, and soil.
Population characteristics, growth models, population interactions1.
Food chains, food webs, ecological pyramids, biodiversity1.
Structure and types of ecosystems (forest, grassland, desert, aquatic)1.