Clean Energy Customers Ordered 70 Percent More Natural Gas Vehicles in First Nine Months of 2013 Compared to 2012

  Clean Energy Customers Ordered 70 Percent More Natural Gas Vehicles in First
  Nine Months of 2013 Compared to 2012

Business Wire

NEWPORT BEACH, Calif. -- December 12, 2013

Clean Energy Fuels Corp. (NASDAQ: CLNE) today announced that its customers
ordered 70 percent more natural gas vehicles through the third quarter of 2013
as compared to the same period in 2012. The Company also announced select
deals in the transit sector building on its continually-growing portfolio of
natural gas fuel customers, and the recognition of its President and CEO
Andrew J. Littlefair by the California League of Conservation Voters for his
environmental leadership.

                 Long Beach Public Transportation Company (LBT) Signs New
TRANSIT:     Multi-Year Operation and Maintenance Agreement to Fuel with
                 Clean Energy

  *LBT has deployed 64 compressed natural gas (CNG) buses and has the
    capacity to serve up to 110 buses at its CNG station.
  *If LBT were to reach capacity of 110 CNG buses, this fleet could consume
    1.5 million gasoline gallon equivalents (GGEs) of CNG per year.
  *LBT’s CNG fleet fuels at its private CNG fueling facility which Clean
    Energy operates and maintains.

Click Here to Learn More

Leading Las Vegas Transportation Company, Whittlesea-Bell Transportation,
Rolls Out 229 New CNG Vehicles and Continues Transition of Entire Fleet to
Natural Gas by 2016

  *Whittlesea-Bell Transportation will deploy the following CNG vehicles: 92
    Transit Connect taxis, 92 Dodge Caravans, 25 large shuttle buses and 20
    stretched Cadillac Escalades, which will be the first of their kind.
  *These vehicles are forecasted to consume 1.3 million GGEs of CNG per year
    once fully deployed.
  *Clean Energy’s six public-access fueling stations in Las Vegas will
    support this growing CNG fleet.

Click Here to Learn More

Leadership:   Clean Energy CEO Andrew J. Littlefair Receives Environmental
                Leadership Award by California League of Conservation Voters

  *Mr. Littlefair was recognized for his work creating America’s Natural Gas
    Highway and Clean Energy’s successful launch of Redeem, the first
    commercially-available renewable natural gas fuel made from organic waste.

Click Here to Learn More

A VIEW FROM THE TOP:

An insider’s look on what this means for the Alternative Fuel Industry from
Clean Energy’s President and CEO, Andrew J. Littlefair:

Looking back at 2013, the pronounced trend toward natural gas as a
transportation fuel is clear with our customers ordering 70% more natural gas
vehicles through Q3 2013 than during the same period last year.

This year, industry experts forecast that approximately 2,400 Cummins Westport
12L natural gas engines are scheduled to come off production lines and into
America’s heavy-duty trucks, a figure which is projected to rise to 10,000 in
2014. In addition, ten more of our America’s Natural Gas Highway stations
began fueling this year for a total of 19 now in service to support America’s
truckers and we will continue to meet this growing demand in 2014 as the
transition accelerates.

2013 also saw promising developments in the rail and maritime industry’s use
of natural gas. These new segments show tremendous promise in the coming years
and we will continue to support them as they develop.

As we end this year, I am tremendously proud of Clean Energy and our
accomplishments in breaking new ground with the successful launch of Redeem as
well as our continued leadership as North America’s largest provider of
natural gas for transportation.

About Clean EnergyFuels Corp.

Clean Energy Fuels Corp. (Nasdaq: CLNE) is the largest provider of natural gas
fuel for transportation in North America. We build and operate compressed
natural gas (CNG) and liquefied natural gas (LNG) fueling stations;
manufacture CNG and LNG equipment and technologies for ourselves and other
companies; and develop renewable natural gas (RNG) production facilities. For
more information, visitwww.cleanenergyfuels.com.

Forward-Looking Statements

This news release contains forward-looking statements within the meaning of
Section 27A of the Securities Act of 1933 and Section 21E of the Securities
Exchange Act of 1934 that involve risks, uncertainties and assumptions,
including statements about the amounts of natural gas fuel expected to be
consumed by LBT and Whittlesea-Bell Transportation respectively. Actual
results and the timing of events could differ materially from those
anticipated in these forward-looking statements as a result of several
factors. The forward-looking statements made herein speak only as of the date
of this press release and, unless otherwise required by law, the Company
undertakes no obligation to publicly update such forward-looking statements to
reflect subsequent events or circumstances. Additionally, the reports and
other documents the Company files with the SEC (available at www.sec.gov)
contain risk factors, which may cause actual results to differ materially from
the forward-looking statements contained in this news release.

Contact:

Clean Energy Fuels Corp.
Media Contact:
Patric Rayburn
Public Relations Manager
949-437-1411
patric.rayburn@cleanenergyfuels.com
or
Investor Contact:
Tony Kritzer
Director, Investor Relations
949-437-1403
tkritzer@cleanenergyfuels.com