NewsNews http://www.boston.com/lifestyle/green/articles/2009/11/30/n

ew_england_sending_a_crowd_to_climate_talks/ http://www.cnn.com/2009/US/11/28/tracking.trash/index.ht

ml http://www.reuters.com/article/email/idUSTRE5AM4GR2009

1123 http://www.reuters.com/article/email/idUSTRE5AN4L620091

124 http://www.boston.com/news/local/articles/2009/11/29/http://www.boston.com/news/local/articles/2009/11/29/

less_trash_adds_up_to_more_cash/less_trash_adds_up_to_more_cash/ http://www.boston.com/news/world/europe/articles/http://www.boston.com/news/world/europe/articles/

2009/11/30/climate_talks_progress_but_hurdles_remain/2009/11/30/climate_talks_progress_but_hurdles_remain/ http://www.boston.com/business/articles/2009/11/30/http://www.boston.com/business/articles/2009/11/30/

remodeled_star_market_well_stocked_with_innovative_greeremodeled_star_market_well_stocked_with_innovative_green_technologies/n_technologies/

Household EnergyHousehold Energy(Gas Heat)(Gas Heat)

My house-November 173 “therms”My house-November 173 “therms”– $0.45 per day$0.45 per day– $0.39 per therm for first 29 therms$0.39 per therm for first 29 therms– $0.22 per therm for next 39 therms$0.22 per therm for next 39 therms– $1.36 per therm delivery charge$1.36 per therm delivery charge– Total Cost is $266Total Cost is $266

What is a therm?What is a therm?

ThermTherm

=100,000 British Thermal Units (BTU)=100,000 British Thermal Units (BTU) ~100 cubic feet of natural gas at standard ~100 cubic feet of natural gas at standard

temperature and pressuretemperature and pressure 29.3 kilowatt-hours29.3 kilowatt-hours http://www.onlineconversion.com/http://www.onlineconversion.com/

energy.htmenergy.htm 1 therm = 0.80 gallons of gasoline1 therm = 0.80 gallons of gasoline

– 173 thems = 138 gallons of gasoline173 thems = 138 gallons of gasoline 1 therm ~ 11 pounds of dry wood1 therm ~ 11 pounds of dry wood

Household Energy Household Energy (Electricity)(Electricity)

1542 kilowatt-hours1542 kilowatt-hours– Delivery charges $0.065 per kWhDelivery charges $0.065 per kWh– Generation charges $0.108 per kWhGeneration charges $0.108 per kWh

Total Cost=$333Total Cost=$333 1542 kwh=42 gallons of gasoline1542 kwh=42 gallons of gasoline

How much energy does it take to How much energy does it take to power a human?power a human?

2000 Calories per day2000 Calories per day 365 days per year365 days per year 730,000 Calories = 23 gallons of 730,000 Calories = 23 gallons of

gasoline per yeargasoline per year– Or about 600 miles drivenOr about 600 miles driven

Energy UsageEnergy Usage

Figure by UMB OpenCourseWare

Energy UsageEnergy Usage Industrial (Industrial (Facilities used for producing and processing goods.)Facilities used for producing and processing goods.)

– 22% chemical production 22% chemical production – 16% petroleum refining16% petroleum refining– 14% metal smelting/refining14% metal smelting/refining

Transportation (Transportation (Vehicles which transport people/goods)Vehicles which transport people/goods)– 61% gasoline fuel61% gasoline fuel– 21% diesel fuel21% diesel fuel– 12% aviation12% aviation

Residential (Residential (Living quarters for private households.)Living quarters for private households.)– 32% space heating32% space heating– 13% water heating13% water heating– 12% lighting12% lighting– 11% air conditioning11% air conditioning– 8% refrigeration8% refrigeration– 5% electronics5% electronics– 5% wet-clean (mostly clothes dryers)5% wet-clean (mostly clothes dryers)

Commercial (Commercial (Service-providing facilities and equipment (businesses, Service-providing facilities and equipment (businesses, government, etc)government, etc)– 25% lighting25% lighting– 13% heating13% heating– 11% cooling11% cooling– 6% refrigeration6% refrigeration– 6% water heating6% water heating– 6% ventilation6% ventilation– 6% electronics6% electronics

Energy Homework (2 pts)Energy Homework (2 pts) 1.) Find your household Electricity and Heating 1.) Find your household Electricity and Heating

(oil, natural gas, or propane). Determine your (oil, natural gas, or propane). Determine your annual energy usage per household. annual energy usage per household. – Note: If you rent and do not pay your own utilities, try to Note: If you rent and do not pay your own utilities, try to

find this from your landlord. If not available, find this find this from your landlord. If not available, find this number for the average American. number for the average American.

2.) Convert the total energy usage (for electrical 2.) Convert the total energy usage (for electrical and for heat) to gallons of gasoline (US) using the and for heat) to gallons of gasoline (US) using the following website:following website:

http://www.onlineconversion.com/energy.htmhttp://www.onlineconversion.com/energy.htm

3.) Estimate how much energy your household 3.) Estimate how much energy your household could realistically conserve. could realistically conserve.

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