Presentation on theme: "Do Now: Write at least three questions about the diagram/picture."— Presentation transcript:
Do Now: Write at least three questions about the diagram/picture.
How Global Warming Works Fossil fuels (coal, oil, natural gas) Carbon Dioxide (CO 2 )
The Sun’s energy passes through the car’s windshield. This energy (heat) is trapped inside the car and cannot pass back through the windshield, causing the inside of the car to warm up. Example of the Greenhouse Effect
What’s the difference between “global warming” and “climate change”?
Difference GLOBAL WARMING is the increase of the Earth’s average surface temperature due to a build-up of greenhouse gases in the atmosphere. CLIMATE CHANGE is a broader term that refers to long-term changes in climate, including average temperature and precipitation.
Effects of Global Warming Increased Temperature Habitat Damage and Species Affected Changes in Water Supply Rising Sea Level
What’s the proof that global warming is taking place?
Portage Glacier 19142004 Alaska Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org
What is carbon dioxide and how is it discovered? Joseph Black, a Scottish chemist and physician, first identified carbon dioxide in the 1750s. Carbon dioxide is a molecule with the molecular formula CO 2. The linear molecule consists of a carbon atom that is doubly bonded to two oxygen atoms, O=C=O.carbon atomoxygen atoms
Applications of carbon dioxide by humans Humans use carbon dioxide in many different ways. The most familiar example is its use in soft drinks and beer, to make them fizzy. Carbon dioxide released by baking powder or yeast makes cake batter rise. Some fire extinguishers use carbon dioxide because it is denser than air. Carbon dioxide can blanket a fire, because of its heaviness.
The part carbon dioxide plays in environmental processes Carbon dioxide plays an important part in vital plant and animal process, such as photosynthesis and respiration.
Environmental problems - the greenhouse effect Greenhouse gasses absorb some of the heat and trap it near the earth's surface, so that the earth is warmed up. This process, commonly known as the greenhouse effect.greenhouse effect The amount of heat in the troposphere depends on concentrations of atmospheric greenhouse gasses and the amount of time these gasses remain in the atmosphere. The most important greenhouse gasses are carbon dioxide, CFC's (Chlor-Fluoro-Carbons), nitrogen oxides and methane.
2007 Goal: Reductions in CO 2 Per Year Billions of Metric Tons Carbon
2007 Reductions in CO 2 Per Year Gigaton Carbon Produce electricity efficiently Use electricity efficiently Vehicle efficiency Solar and Wind Power Biofuels Carbon capture and storage Billions of Metric Tons Carbon Our Goal
What’s being done now to reduce our emissions? Solar PowerWind PowerFuel-Efficiency
Simple Things To Do Turn off your computer or the TV when you’re not using it. Take shorter showers. Heating water uses energy. Keep rooms cool by closing the blinds, shades, or curtains. Turn off the lights when you leave a room. Use compact fluorescent bulbs.
Be Bulb Smart—Use CFLs Incandescent Compact Fluorescent 500 lbs. of coal What’s the difference? 1,430 lbs. CO 2 pollution avoided $30 saved
Simple Things To Do Plant a tree. Dress lightly when it’s hot instead of turning up the air conditioning. Or use a fan. Dress warmly when it’s cold instead of turning up the heat. Offer to help your parents keep the air filters on your AC. Walk short distances instead of asking for a ride in the car. Recycle.