1 / 17

Earth’s Atmosphere

Earth's atmosphere consists of various gases essential for life, including nitrogen (78%), oxygen (20%), and carbon dioxide (0.036%). Animals produce carbon dioxide via cellular respiration, while plants generate oxygen through photosynthesis, creating a natural balance. However, human activities like combustion of fossil fuels contribute significantly to air pollution, emitting millions of tons of CO2 annually. To mitigate the greenhouse effect and reduce air pollution, we can adopt clean energy solutions, use electric vehicles, and plant trees to capture carbon dioxide.

raoul
Télécharger la présentation

Earth’s Atmosphere

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Earth’s Atmosphere The Air Sphere

  2. Gases in the Air • Many gases make up the air we breathe • Nitrogen (78%) • Oxygen (20%) • Water Vapour (0-4%) • Carbon Dioxide (0.036%) • Methane, Nitrous Oxide, Ozone (< 0.001%)

  3. Where do these gases come from? Cellular Respiration • A process used by animals to produce energy from food that is consumed ConsumedReleased Oxygen + sugar  carbon dioxide + water + energy

  4. Products of Cellular respirationsteam (water vapour) and carbon dioxide

  5. Where do these gases come from? Photosynthesis • Process used by plants to produce energy • Energy from sunlight is captured using chlorophyll and used to produce sugars Consumed Released Carbon dioxide + water  sugars + oxygen

  6. Natural Balance • Cellular respiration requires oxygen and produces carbon dioxide • Animals breathe in oxygen, and exhale carbon dioxide • Photosynthesis requires carbon dioxide and produces oxygen • Plants absorb carbon dioxide and release oxygen

  7. Air Pollution Combustion • Energy from hydrocarbons (fossil fuels, gasoline, natural gas) is used to power vehicles, heat homes, produce electricity etc. Hydrocarbon + oxygen  carbon dioxide + water • Burning fossil fuels requires oxygen, and produces carbon dioxide which is released into the atmosphere

  8. Air Pollution Sources in Canada • Vehicle Emissions • Industrial Sources (factories) • Energy Production (for electricity and heating) • Livestock and fertilizers In 2009, Canada emitted 521 megatons of CO2 • that’s 521 million tons of carbon dioxide released into the atmosphere in one year

  9. Ontario’s Energy, Nanticoke Power Plant • North America’s largest coal-fired power plant • Produced more than 8 million tonnes of carbon dioxide in 2010

  10. Greenhouse Effect

  11. Greenhouse Effect • Greenhouse gases (GHG’s) trap and re-radiate heat from the sun back towards Earth • This is normal (to some extent), keeps Earth warm enough for life • Greenhouse Gases • Water vapour • Methane • Carbon dioxide • Ozone • Carbon monoxide

  12. Greenhouse Effect with Pollution

  13. Solutions to Reduce Air Pollution • Reduce carbon dioxide emissions • Hybrid-electric vehicles use burn less gasoline • Fully-electric vehicles use no gasoline • Stop burning fossil fuels for energy (use solar or wind power instead) • Remove carbon dioxide from the atmosphere • Planting trees helps capture and store carbon dioxide by photosynthesis

  14. Reduce Carbon Dioxide • Hybrid-Electric Vehicles burn less gasoline than conventional vehicles

  15. Reduce Carbon Dioxide Fully-Electric Vehicles burn no gasoline Fully-electric Tesla Model S

  16. Reduce Carbon Dioxide • Stop burning fossil fuels to produce energy • Switch to wind, solar, hydro power Wind Turbine, Toronto’s Lakeshore

  17. Remove Carbon Dioxide • Planting trees helps capture and store carbon dioxide by photosynthesis

More Related