Clean Energy Solutions Louisiana Clean Cities Conference —

Clean Energy Solutions Louisiana Clean Cities Conference - New Orleans March 27, 2008 1

Clean Energy Leading Provider of Natural Gas As a Transportation Fuel Compressed Natural Gas (CNG) Taxis Airport Transit Government Vehicles Liquefied Natural Gas (LNG) Regional Trucking Refuse Hauling Public Transit 2

Clean Energy l Comprehensive Services – – – l Design, build & operate CNG/LNG fueling stations LNG production & delivery for heavy duty vehicles Grant writing services 24/7 On-call locally based service techs Vehicle financing Industry Leading Statistics – 170+ CNG/LNG stations across North America – Over 14, 000 customer vehicles fueled daily – 73 MM gallons in 2007 l Background – Founded in 1997 as PFC became Clean Energy in 2002 – Publicly-traded as CLNE on NASDAQ Pickens LNG Plant, Willis, Texas 3

Expanding LNG Production Capacity Texas Plant l l Pickens Plant, Acquired 2005 35 Million LNG Gallons / Year Annual Capacity California Plant l l Operational in 2008 60 -90 Million LNG Gallons / Year Annual Capacity + 4 Third-Party LNG Producers 4

Continued Customer Momentum Airports l l We Currently Serve 18 Major Airports Expansion Plans in the U. S. Require Mitigation Ongoing Emphasis on Reducing Tailpipe Emissions 156, 000 Taxis in 2004 Seaports l l Within 5 Years, Ports of LA and Long Beach Are Targeting to Replace 10, 000 Diesel Trucks Focus on Converting Yard Hostlers to Natural Gas Vehicles Transit and Refuse l l l We Currently Fuel 2, 900 Transit Buses and 790 Refuse Trucks 200, 000 Domestic Refuse Trucks and 80, 000 Domestic Transit Buses Smithtown, NY Mandate 5

Natural Gas for Transportation: A Large Piece of the Alternative Fueling Puzzle Cheaper Cleaner Domestically Available 6

Consistently Cheaper: Fuel Price History Natural gas has been 25 - 42% cheaper than Diesel over last 14 years 7

NGVs Produce Significantly Less Smog & Soot N 0 x Reduction: Less Smog Greenhouse Gases ≥ 85% CEC’s Well to Wheels Study 0 -25% l 10 -15% 2 -6% 0 -3% Minimal -5 -0% l 23% GHG reduction compared to diesel fuel 30% GHG reduction compared to gasoline fuel PM Reduction: Less Soot ≥ 90% w/Cat O >85% 50 -65% C O 35 -40% ~20% 15 -20% Source: South Coast Air Quality Management District 2007 Air Quality Management Plan Summit Panel 8

Large, Secure, Domestically Available Supply of NG Natural Gas 98% Supplied From US and Canada Imported l l l 80+ Years of Domestic Reserves (30 -40 Years Longer Than Oil)* World NG Reserves Estimated at 3 x that of Oil Reduces Dependence on Foreign Oil 4% of Existing Supply will fuel 11 Million autos 20% of today’s use is for Power Generation – Could fuel 55 Million autos Bio Methane available from Landfills, Agriculture & Wastewater *Based on Current Rate of Consumption Sources: EIA 2006, Clean Energy 9

180+ Natural Gas Fleet Models Available Today Trucks Transit Buses & Taxis Refuse Trucks Street Sweepers Delivery Trucks 10

Cummins Westport ISL-G Natural Gas Engine l ISL-G exceeds 2010 emissions standards today l 0. 1 g NOx & 0. 009 g PM) l 6 X cleaner than a diesel engine l 34% more torque at idle l Improved efficiency = improved fuel economy l No exhaust related maintenance costs Cummins Westport ISL G Engine 11

CNG Station Examples 12

DFW International Airport South Side 13

Dallas Love Field Airport 14

Waste Management Irvine Time Fill 15

H&C Refuse Truck Refueling 16

Los Angeles International Airport LAX station 17

Denver International Airport 18

Phoenix- Sky Harbor Int’l Airport Eastside station 19

Phoenix- Sky Harbor Int’l Airport Rental Car Center 20

Phoenix- Sky Harbor Int’l Airport Rental Car Center 21

Phoenix- Sky Harbor Int’l Airport Westside station 22

Jimmy Ramsey (214)-572 -6582 jramsey@cleanenergyfuels. com www. cleanenergyfuels. com 23