- abandon: to leave, to give up
- adversely: in a harmful way, negatively
- aggregate: gathered into or amounting to a whole
- catastrophic: extremely harmful, causing financial or physical ruin
- cultivation: preparing the land to grow crops or improvement for agricultural purposes
- diverse: showing a lot of differences within a group
- evolve: to develop or come forth
- fertilize: to supply with nourishment
- generation: a group of people born at about the same time
- inherent: usually found within something because it is a basic part of that thing
- intensify: to increase power
- irrigation: the supplying of water to dry land
- persevere: to keep going despite obstacles or discouragement
- photosynthesis: the process by which green plants make their own food
- precipitation: water that falls to Earth's surface
TOEFL