Environmental Science
Biogeochemical Cycle
Quick fact
Only about 0.04% of Earth's carbon moves through the atmosphere each year—the rest is stored in oceans, rocks, and living things, yet this tiny fraction fuels nearly all life.
Why this is interesting
Every breath you take contains oxygen that might have been exhaled by a dinosaur millions of years ago. How does the same matter get used over and over again to support all life on Earth?