Environment
Protecting Air Quality
Remember learning about photosynthesis in school? Plants absorb carbon dioxide (CO2), use it as they grow, and then respire—or exhale—oxygen. Even pine trees, with their thin needles, use this process as they grow. Humans and animals do the opposite: we breathe in oxygen and exhale CO2.
While exhaling CO2 is natural, there is also unnatural CO2 in our atmosphere. Our modern world uses cars, which burn gasoline. Factories also burn fossil fuels. And our electricity, the appliances we use to heat our homes, and other modern tools burn fossil fuels.
All of this extra CO2 is harmful for the environment because it causes the “greenhouse” that is our atmosphere to remain hotter than it naturally would. The process in which the earth is getting hotter is called climate change.