Final answer:
When the amount of carbon dioxide decreases in the environment, it negatively affects the overall growth of plants as it hampers the process of photosynthesis, specifically the Calvin cycle which converts CO2 into glucose. Without sufficient CO2, plants experience reduced or halted growth.
Step-by-step explanation:
When the amount of carbon dioxide (CO2) decreases in the environment, it affects the overall growth of plants negatively. CO2 is essential for photosynthesis, the process by which plants convert sunlight, water, and CO2 into glucose and oxygen.
During photosynthesis, plants use CO2 as a raw material to produce glucose. Without enough CO2, the Calvin cycle, the part of photosynthesis that converts CO2 into glucose, slows down or may even stop. This leads to reduced or halted growth in plants.
To illustrate, imagine if a school cafeteria suddenly ran out of ingredients to prepare meals. The chef can no longer cook and provide meals, leading to a decrease in the overall growth and well-being of the students who rely on the cafeteria for nourishment.