Assume that: Air transportation requires 12,000 Btu/ton-mile Truck transportation requires 3000 Btu/ton-mile. Ship transportation requires 470 Btu/ton-mile Bananas travel by ship for 1250 miles from Costa Rica to Miami Bananas travel by truck for 670 miles from Miami to Atlanta Assume the ship and truck return to their destination with other cargo, so the back-haul does not have to be considered. An average banana weighs 0.1 kg. 1 Btu = 1055 J 1 gallon of gasoline contains 132 MJ c. Reducing last mile energy use. The baseline shopping scenario is driving 2 miles to the grocery store, buying 10 kg of groceries, and driving 2 miles home, in a car that has an efficiency of 25 miles per gallon. Three strategies to reduce transportation energy use from grocery shopping (last mile energy use) are (i) shopping half as frequently and thus reducing transportation energy use by a factor of two, (ii) shopping on the way to or from work, thereby essentially eliminating the transportation energy, (iii) using a grocery delivery service that delivers to 3 nearby customers by driving the two miles to customer 1, another mile to customer 2, another mile to customer 3, and the two miles back to the grocery store. This service costs $5 per customer delivery. Assume gasoline costs $3/gallon and that the grocery delivery service car also gets 25 miles per gallon. Show your work and put your answers in the table. Transportation energy use per 10 kg of groceries (MJ) Cost per saved MJ of gasoline, compared to baseline Total operational cost of transportation: gasoline purchased by the shopper, or service fee for grocery delivery, per 10 kg groceries 0 Baseline shopping scenario Shopping half as frequently Shopping on the way somewhere else Grocery Delivery Assume that: Air transportation requires 12,000 Btu/ton-mile Truck transportation requires 3000 Btu/ton-mile. Ship transportation requires 470 Btu/ton-mile Bananas travel by ship for 1250 miles from Costa Rica to Miami Bananas travel by truck for 670 miles from Miami to Atlanta Assume the ship and truck return to their destination with other cargo, so the back-haul does not have to be considered. An average banana weighs 0.1 kg. 1 Btu = 1055 J 1 gallon of gasoline contains 132 MJ c. Reducing last mile energy use. The baseline shopping scenario is driving 2 miles to the grocery store, buying 10 kg of groceries, and driving 2 miles home, in a car that has an efficiency of 25 miles per gallon. Three strategies to reduce transportation energy use from grocery shopping (last mile energy use) are (i) shopping half as frequently and thus reducing transportation energy use by a factor of two, (ii) shopping on the way to or from work, thereby essentially eliminating the transportation energy, (iii) using a grocery delivery service that delivers to 3 nearby customers by driving the two miles to customer 1, another mile to customer 2, another mile to customer 3, and the two miles back to the grocery store. This service costs $5 per customer delivery. Assume gasoline costs $3/gallon and that the grocery delivery service car also gets 25 miles per gallon. Show your work and put your answers in the table. Transportation energy use per 10 kg of groceries (MJ) Cost per saved MJ of gasoline, compared to baseline Total operational cost of transportation: gasoline purchased by the shopper, or service fee for grocery delivery, per 10 kg groceries 0 Baseline shopping scenario Shopping half as frequently Shopping on the way somewhere else Grocery Delivery