Section Warm-Up
Along with water, mineral nutrients, and living things, air is a vital part of Earth’s life-support system. Without Earth’s unique oxygen-rich atmosphere nothing could live on Earth. Earth’s atmosphere and the living things on this planet are interconnected. One way interconnection takes place is through the process of photosynthesis. During this process, plants use sunlight and carbon dioxide from the air to make their own food. What do green plants then give back to the atmosphere that makes all animal life on Earth possible? Click the image below to review the role of photosynthesis in the maintenance of Earth’s atmosphere.
