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Similaire à Role of Trees in Cleaning the Air
Similaire à Role of Trees in Cleaning the Air (20)
Role of Trees in Cleaning the Air
- 1. The Role of Forests in Cleaning the Air
- 2. What’s wrong with the air, anyway? Carbon emissions!!! • CO2 = major greenhouse gas • Causes global warming: traps heat • Comes from burning fossil fuels • Mostly by cars and energy plants
- 3. How do trees help? 1) Photosynthesis: *Absorb CO2 *Separate carbon from oxygen *Store carbon in roots and wood (“carbon sinks”) *Release oxygen for us to breathe!
- 4. Did you know??? One large tree can provide enough oxygen for 4 people for a whole day!
- 5. Did you know??? You need about 500 full-sized trees to absorb the carbon dioxide produced by a typical car driven 20,000 km/year ! Since young trees absorb more carbon than old ones, planting new trees is a great way to help reduce the carbon in the atmosphere!
- 6. Did you know??? • In one year, an acre (0.405 hectare) of trees can absorb as much carbon as is produced by a car driven up to 14,000km! • That would be like driving to Mexico and back twice!
- 7. Did you know??? The death of one 70-year old tree would return over three tons of carbon to the atmosphere! To put this in perspective…a car only weighs 2 tons!
- 8. How do trees help? 2) Lowering our energy needs *Trees planted near buildings provide shade and break the cold wind *We use less air conditioning and heating (30% less!) *Power plants release less CO2!
- 9. How do trees help? 3) Filter the air from: Carbon monoxide, lead, nitrogen dioxide, ozone, particulate matter and sulfur dioxide A healthy tree can reduce dust particles in the air by as much as 7,000 particles per litre of air!
- 10. How do trees help? By removing these chemicals, trees reduce: *headaches *lung, throat and eye irritation *respiratory disease *heart disease *cancer
- 11. We are losing our trees! Approximately every 3 seconds we lose a whole hectare of forest! A hectare is bigger than a football field!
- 12. Forest Management vs. Deforestation Forest Management: Cutting the trees, using them to make products and then re-planting the trees…
- 13. Forest Management vs. Deforestation Deforestation: Cutting the trees without re-planting. Example: building a mall or a parking lot.
- 14. What can we do to help? YOU are helping right now by participating in tree-planting projects like the Clean Air Tree Kits project!
- 15. Quiz time! How big is YOUR carbon footprint? Let’s find out… http://www.zerofootprintkids.com/kids_home.aspx