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Carbon Dioxide Emissions and Fuel Economy by Model Year
Carbon Dioxide Emissions and Fuel Economy by Model Year Two graphs show carbon dioxide emissions and fuel economy by model year from 1975-2010. Source: U.S. EPA, Light-Duty Automotive Technology, Carbon Dioxide Emissions, and Fuel Economy Trends: 1975 through 2010 (Nov. 2010), p. iv

Other ways to increase efficiency can be found through innovative alternative vehicle technologies, improved internal combustion engines, exhaust gas recycling, variable valve timing, vehicle downsizing, lightweighting , and behavior. Government policies need to make the cost of driving evident through full amortization, fuel/road tax, and insurance costs.

Another tactic to reduce fuel consumption is increasing the use of transportation alternatives. The use of active transportation will cause a change from environmentally harmful, passive travel to clean, active travel by bicycle, foot, and public transit. Convenient and safe public transit is not available in all communities, as it requires a certain population density to be viable. Moreover, since Americans often associate the car they drive with their material success and our communities are spread out, many people do not view public transportation favorably. Most metropolitan areas have some kind of transit system to provide transportation to those who cannot afford cars or cannot drive and/or to relieve traffic congestion. Historically, the United States has not invested equally in road and public transportation infrastructure meaning that often it is slower and more complicated to travel by transit. However, transit use is generally more economical than owning and driving a car. The American Public Transportation Association has calculated the savings based on a two person-two car household going to one-car. They found that riding public transportation saves individuals, on average $9,656 annually, and up to $805 per month based on the January 5, 2011 average national gas price ($3.08 per gallon-reported by AAA) and the national unreserved monthly parking rate. Savings for specific cities are shown here .

Bicycling and walking are two forms of alternate transit that have no environmental impact on energy demand. Many local governments are devoting resources to adding bike routes and parking facilities to encourage bicycling as a mode of transportation. Sidewalks and safe cross-walks are prerequisites for safe walking.

There are some options for those who must drive to reduce their energy use. Carpooling    and car sharing are also options that lower the number of cars on the road, while providing opportunities to travel by car when needed. Improved social network-based car-pooling programs can help to match riders with drivers in a dynamic way. Car sharing is a decentralized, hourly car rental system that allows people who do not own cars, but occasionally need one, to access a vehicle in proximity to their workplace or home.

Summary

There is no one silver bullet when it comes to solving the "energy problem" or planning for climate action. There are many viable solutions and the problem is so large that multiple pathways must be forged. The primary challenge is to use energy more efficiently so little goes to waste. From small actions like changing a light bulb, to large projects like CHP, the potential is great and the financial payback rewarding. Increased vehicle efficiency and active transportation are also strategies for reducing energy use. Both within the building sector and the transportation sector we have the greatest challenges to and potential for changing how we use energy today. We have already started to make that transition from more stringent CAFÉ standards to more green buildings. The challenge is to upscale all the strategies to make a significant impact.

Review questions

What does the chart in Figure Energy Demand and GDP Per Capita (1980-2004) tell us about developing countries such as China, India and Brazil’s energy use? a) In comparison to developed countries. b) Over time.

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Briefly describe a path to reducing our dependency on fossil fuels for transportation energy consumption.

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Why is energy efficiency considered a sustainable energy choice?

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References

Brown, L.R. (2008). Plan B 3.0: Mobilizing to save civilization . New York: Earth Policy Institute.

City of Chicago. (2011). Chicago Climate Action Plan . Retrieved September 12, 2011 from (External Link)

Eagan, D.J., Calhoun, T., Schott, J.&Dayananda, P. (2008). Guide to climate action planning: Pathways to a low-carbon campus . National Wildlife Federation: Campus Ecology. Retrieved September 12, 2011 from (External Link)

Gore, A. (2009). Our choice: A plan to solve the climate crisis . New York: Melcher Media.

Pacala, S.&Socolow, R. (2004). Stabilization wedges: Solving the climate problem for the next 50 years with current technologies. Science, 305 , 968-972.

University of Illinois at Chicago. (2009). UIC Climate Action Plan . Retrieved September 12, 2011 from (External Link) .

Questions & Answers

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
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Practice Key Terms 9

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Source:  OpenStax, Sustainability: a comprehensive foundation. OpenStax CNX. Nov 11, 2013 Download for free at http://legacy.cnx.org/content/col11325/1.43
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