Natural Gas For Transportation: America s Best Kept Secret Mike Cecere, Account Manager New Jersey, Pennsylvania, and D

1. Natural Gas For Transportation:America�s Best Kept SecretMike Cecere, Account ManagerNew Jersey, Pennsylvania, and Delaware September 17, 2008

2. Clean Energy Comprehensive Services Design, build & operate CNG/LNG fueling stations LNG production & delivery for HDVs Grant writing services Vehicle financing Background Founded in 1997 as Pickens Fuel Corp Became Clean Energy in 2002 Based in Seal Beach, California Publicly-traded as CLNE on NASDAQ Industry Leader 180+ CNG/LNG fueling stations across N. America Over 14,000 customer vehicles fueled daily CE is a diverse company with comprehensive services all designed to enhance our customers natural gas vehicle experience. We are well capitalized and have demonstrated significant growth year-to-year. In addition to the transit market, Clean Energy has poured significant resources into developing natural gas vehicle markets for refuse, airport transportation, and intrastate trucking. We are committed to the natural gas vehicle industry and the success of our efforts in New York. CE is a diverse company with comprehensive services all designed to enhance our customers natural gas vehicle experience. We are well capitalized and have demonstrated significant growth year-to-year. In addition to the transit market, Clean Energy has poured significant resources into developing natural gas vehicle markets for refuse, airport transportation, and intrastate trucking. We are committed to the natural gas vehicle industry and the success of our efforts in New York.

3. National & International Presence

4. What is Fueling Clean Energy�s Growth? Economic and Regulatory Drivers Cost of Conventional Fuels (Diesel and Gas prices at record highs) New Diesel Standards and Technology Greenhouse Gas and Energy Regulations Port of Los Angeles and Long Beach- Clean Air Action Plan Unique Suite of Services Grant Support- $100,000,000 SO FAR!! Clean Energy Finance Pay 100% Capital Expense for Qualifying Customers� Infrastructure Aggressive and Targeted Marketing Effort Vehicle Demonstrations- Refuse, Airport Shuttles, Taxicabs Focus on Heavy-Duty- Refuse/Recycling, Transit, and Seaports

5. Niche Markets: Airports A �hub� for ground transportation Taxis, Limos, Door-to-Door Shuttles, Courtesy Shuttles CE operates at 18 of the US� largest airports including: Atlanta (coming soon), Dallas-Fort Worth, Denver, LAX, New York La Guardia, Phoenix, San Francisco, and Seattle Many airports around the US have implemented policies supporting the use of NGVs

6. Niche Markets: Transit 30% of all new transit buses in the US are natural gas Low cost operation, clean, and quiet CE provides daily fueling services for over 3,200 transit buses including: Boston MBTA, Dallas ART, Foothill Transit, MTA Long Island Bus, San Diego Transit, and Valley Metro (Phoenix, AZ) OEM built by El Dorado, NABI, New Flyer, Orion

7. Niche Market: Refuse and Recycling Currently, over 2,500 refuse trucks run on natural gas Autocar announced a 60% increase in natural gas truck sales vs. past year Natural gas refuse trucks are cleaner and quieter CE fuels over 1000 refuse trucks daily including: Burrtec Industries; Fresno, CA; Smithtown, NY; and Waste Management More municipalities across the US are selecting natural gas trucks for residential collection services in 2007/08 including: Brookhaven, NY; Hamilton, NJ; New York City; San Antonio, TX; Seattle, WA; Smithtown, NY

8. Ports and Trucking Major seaports are essential for strong international trade, but: They are major sources of pollution They are major sources of truck traffic The Ports of Los Angeles and Long Beach instituted landmark policies to reduce emissions Replacing 5,300 drayage trucks with natural gas trucks CE building 3 LNG stations Capacity, Kenworth, Ottawa and Sterling are producing OEM natural gas trucks for port operations

9. Additional Key Niche Markets Delivery Fleets School Districts Government and Private Fleets

10. Natural Gas for Transportation: America�s Best Kept Secret I think the reason natural gas has been so successful is it makes business sense. It�s cheaper, cleaner, and domestically available. I think the reason natural gas has been so successful is it makes business sense. It�s cheaper, cleaner, and domestically available.

11. NGVs Produce Significantly Less Smog and Soot If you compare the smog and soot emissions of different types of alternative fuels, natural gas vehicles produce significantly less smog and soot. These two tables show the percentage reduction in NOx and PM compared to emissions from standard diesel engines.If you compare the smog and soot emissions of different types of alternative fuels, natural gas vehicles produce significantly less smog and soot. These two tables show the percentage reduction in NOx and PM compared to emissions from standard diesel engines.

12. Natural Gas vs. Gasoline & Diesel We believe this price advantage will continue. As crude oil prices rise, natural gas becomes more compelling than ever.We believe this price advantage will continue. As crude oil prices rise, natural gas becomes more compelling than ever.

13. Consistently Cheaper: Fuel Price History Natural gas prices have followed Petroleum prices BUT natural gas cheaper by 25 -40% over last 14 years. Anyone remember the 70�s and the gas shortage? �I�ll ride my bicycle to work if gas hits $1.00 per gallon Guess what? No bicycles in the parking lot! Look at some more facts. (Next Slide)Natural gas prices have followed Petroleum prices BUT natural gas cheaper by 25 -40% over last 14 years. Anyone remember the 70�s and the gas shortage? �I�ll ride my bicycle to work if gas hits $1.00 per gallon Guess what? No bicycles in the parking lot! Look at some more facts. (Next Slide)

14. Federal Tax Credits We believe this price advantage will continue. As crude oil prices rise, natural gas becomes more compelling than ever.We believe this price advantage will continue. As crude oil prices rise, natural gas becomes more compelling than ever.

15. Large, Secure, Domestically Available Supply of NG There is a lot more natural gas readily available in the US than crude oil. 98% of our natural gas is supplied from the US and Canada. Not only is the supply available, it�s expected to last many, many more years than oil. By choosing natural gas over crude we will ultimately be able to reduce our dependence on foreign oil. There is a lot more natural gas readily available in the US than crude oil. 98% of our natural gas is supplied from the US and Canada. Not only is the supply available, it�s expected to last many, many more years than oil. By choosing natural gas over crude we will ultimately be able to reduce our dependence on foreign oil.

16. What�s in it for our fleet customers?

17. Conclusion/Next Steps Clean Energy is the premier supplier of natural gas vehicle fueling services in North America with operations expanding around the globe We target high fuel use, high visibility fleet operations Natural gas vehicles are cleaner, cheaper, and domestic Operators can save anywhere from $.75 - $1.25 per gallon as compared to gasoline/diesel 98% of natural gas is domestically available A partnership with Clean Energy allow our fleet customers the advantage of a well qualified team to provide professional 1st class fueling service and other value-added services Next Steps Evaluate potential customers and strategic station locations Procurement Plan for Natural Gas Vehicles and estimated gas usage Create a station design and fuel proposal that fits the customers needs

18. The third reason natural gas is compelling is that it�s domestically available.The third reason natural gas is compelling is that it�s domestically available.