Our Changing Climate Unit 2 - Lesson 5: Our Changing Climate // P. - - PowerPoint PPT Presentation

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Dec 27, 2022 205 likes •288 views

Unit 2 - Lesson 5: Our Changing Climate Unit 2 - Lesson 5: Our Changing Climate // P. 1 Unit 2 - Lesson 5: Our Changing Climate // P. 1 The temperature in New York City Weather averaged 82 degrees Fahrenheit on vs. July 20, 2010. Climate

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Unit 2 - Lesson 5:

Our Changing Climate

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Weather vs. Climate

The temperature in New York City averaged 82 degrees Fahrenheit on July 20, 2010. The temperature in New York City averaged 77 degrees Fahrenheit for the month of July between 1981 and 2010.

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Adapted from: "The Greenhouse Effect." US EPA (December 2012), Climate Change Indicators in the United States, 2nd edition, Washington, DC, USA: US EPA, http://www.epa.gov/climatechange/science/indicators/download.html, p.3. EPA 430-R-12-004. ¡

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Sources of Greenhouse Gases

Decomposition of food waste in landfills Use of nitrogen-based fertilizer on crops Transporting food products Bacterial decomposition in rice paddies Livestock waste left on fields Clearing forests for farmland Digestion of organic material by livestock Running agricultural machinery Methane Nitrous oxide Carbon dioxide, nitrous oxide & methane Methane Methane & nitrous oxide Carbon dioxide Methane & nitrous oxide Carbon dioxide, nitrous oxide & methane

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Photo ¡credit ¡: ¡Bob ¡Nichols, ¡USDA, ¡2013. ¡Some ¡rights ¡reserved ¡. ¡

Drought

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Climate Change Impacts on Agriculture

Loss of topsoil
Fungus invasion in corn crop
Saltwater contamination of freshwater supply
Increased cost to fight weeds
Increase in a crop’s water needs
Higher food prices
Depletion of freshwater sources for irrigation

Photo ¡credit: ¡Brendan ¡Cox, ¡Oxfam ¡InternaEonal, ¡2004. ¡Some ¡rights ¡reserved. ¡

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Food System Greenhouse Gas Emissions

GHG emissions by food type GHG emissions by supply chain stage