Date post: | 18-Dec-2015 |
Category: |
Documents |
Upload: | bertha-lester |
View: | 214 times |
Download: | 0 times |
MET 12 Global Climate Change – Lecture 12
Transportation
Shaun Tanner
San Jose State University
Greenhouse Gas Emissions
Transportation~ 30% of all end use emissions
Transport
Climate Solutions
FoodHousing
Burrito (Beef): 850 calories: $6.10
Burrito (Veggie): 830 calories: $5.75
CO2: 3.8 kg
CO2: 0.5 kg
CO2 per dollar: 636
CO2 per dollar: 94
Calories per dollar: 140
Calories per dollar: 145
Burrito
How far can you travel on a burrito?
Driving 55
In 1974 55 mph national speed limit law passed
2% reduction in highway fuel consumption 2000-4000 lives saved annually Law altered in 1987 and repealed in 1995
Miles per gallon
Highway Speed Limits
Fuel efficiency versus speed
Assignment
Campaign to reduce highway speed limit
1. Calculate fuel and CO2 emissions for bay area trip to Lake Tahoe (and return) driving at a speed of 55 mph and 75 mph.
2. Calculate equivalent measures: plastic bottles, plastic bags, burritos and iPods
3. Write a pitch (1 paragraph) advocating for speed limit reduction
Data San Jose to Lake Tahoe = 230 miles Avg vehicle: 35 mpg @ 55 mph Avg vehicle: 25 mpg @ 75 mph 1 gallon of gas burned = 20 lbs of CO2 1 water bottle ~ 1.7 lbs of CO2 1 plastic bag ~ 0.14 lbs of CO2 1 iPod ~ 50 lbs of CO2 1 veggie burrito ~ 1.1 lbs of CO2 1 beef burrito ~ 8.4 lbs of CO2