Answer: Both
Explanation:
Economists use water and fish migration to figure out surroundings and the way the earth is impacted.
Technicians use there knowledge for example depth finders so they can help game wardens entds with lake depth for example. Also for fixing boat motors.
see plants are also living beings, they also need oxygen for respiration. There would be less carbon dioxide available for plants for photosynthesis. Atmosphere will be clean, less polluted, clean water. No fighting, peaceful, cool environment
