Why should we care about adding to our carbon footprints? Here’s why: Carbon dioxide traps the Sun’s heat in our atmosphere. That’s called the greenhouse effect. It’s the main cause of global warming. Global warming leads to changes on Earth that can cause droughts, floods, habitat loss for plants and animals, and a rise in sea level. What you eat has a big impact on your carbon footprint. How can you help? Eating fresh food reduces your carbon footprint. Plant a vegetable garden. Talk with adults who buy your food about choosing food that is grown locally (within 100 miles of home).