Technology Deployment

RNS Number:3113T
Clean Diesel Technologies, Inc
29 April 2008





   Clean Diesel Technologies Reduces Emissions for Skanska on New York City's
                          Largest Public Works Project


  Skanska deploys Clean Diesel's patented PurifierTM System based on Catalyzed
     Wire Mesh Filter technology to reduce diesel particulate matter by 76%



Stamford, CT - April 29, 2008 - Clean Diesel Technologies, Inc. (NASDAQ:CDTI;
XETRA:CDIA; AIM:CDT), the cleantech emissions reduction company, and Skanska
(STO:SKAB), one of the world's leading construction groups, today announced the
successful deployment of Clean Diesel's Purifier System based on its patented
catalyzed wire mesh filter (CWMF) technology on Skanska cranes being used for
the construction of a new water filtration facility in Croton, NY, a source of
drinking water for Manhattan and the Bronx. The $1.3-billion project is the
largest single construction contract in New York City history.

Clean Diesel CEO Bernhard Steiner says, "We are proud to be part of a project of
such unprecedented scale - and pleased to provide an effective solution to
Skanska. Our emissions reduction technology will enable Skanska to undertake
this major construction effort with a dramatically reduced impact on the natural
environment."

In a May 2007 press release, Skanska announced it had "landed its largest order
in the US to date" - a $1.3-billion contract from the New York City Department
of Environmental Protection (NYCDEP) for construction of a 377,000 sq.-ft.
concrete water treatment facility and installation of machinery, piping and
control equipment.

The NYCDEP requires all diesel-powered equipment which will be utilized on-site
to use ultra-low sulfur fuel and to install Best Available Control Technology
(BACT) to reduce particulate matter (PM) emissions.

Skanska is currently operating numerous cranes on-site which, because of the
nature of the work, do not regularly produce a sufficiently high exhaust gas
temperature to sustain the use of a passive diesel particulate filter (DPF).
Conventional diesel particulate filter systems deliver inadequate total
performance for this type of application and are high maintenance. Active-
regeneration DPF's require the shut down of the crane engines to accomplish the
regeneration. This presents a safety risk to personnel working under and in
close proximity to suspended loads. Skanska, with the approval of the client,
has successfully deployed the Clean Diesel Purifier CWMF System, since there is
no need to shut down the cranes to accomplish the regeneration with this system.
It has been verified by the U.S. Environmental Protection Agency (EPA) to reduce
PM by up to 76%, nitrogen oxides (NOx) up to 9%, carbon monoxide up to 66% and
hydrocarbons up to 89%.



Skanska Vice President Ali Catik says, "As a global leader in construction and
development we take our responsibility to the environment seriously. This is why
after discussions with the client; we elected to pursue the highest-rated EPA
solution for this challenging low-temperature emission control application.
Clean Diesel's technologies are world-class sustainability solutions that help
us reduce the environmental impact of large-scale construction projects. When
the Croton Water Filtration Plant is completed it will enable millions of New
Yorkers to enjoy clean, purified drinking water."



"This emissions reduction implementation is groundbreaking within the industry,
as it extends the proven performance of the Purifier CWMF System to construction
crane applications", added Dr. Steiner.



About Clean Diesel Technologies

Clean Diesel Technologies (NASDAQ: CDTI) is a cleantech company providing
sustainable solutions to reduce emissions, increase energy efficiency and lower
the carbon intensity of on- and off-road engine applications. Clean Diesel's
patented technologies and products allow manufacturers and operators to comply
with increasingly strict regulatory emissions and air quality standards, while
also improving fuel economy and power. The Company's solutions, which are in
commercial use worldwide, significantly reduce emissions formed by the
combustion of fossil fuels and biofuels, including particulate matter (PM),
nitrogen oxides (NOx), carbon monoxide and hydrocarbons. Clean Diesel solutions
also reduce carbon dioxide (CO2) emissions, a key greenhouse gas associated with
global climate change.



Clean Diesel develops and manages intellectual property from original concept to
full-scale commercial deployment. Its offerings include ARIS(R) Selective
Catalytic Reduction (SCR); the patented combination of SCR and Exhaust Gas
Recirculation; hydrocarbon injection for emissions control applications;
Platinum Plus(R) Fuel-Borne Catalyst (FBC); the PurifierTM family of particulate
filter systems; and its Wire Mesh Filter particulate filter technologies. The
Company was founded in 1995 and is headquartered in Stamford, Connecticut. A
wholly owned subsidiary, Clean Diesel International, LLC, is based in London,
England. For more information, please visit www.cdti.com.



About Skanska

Skanska USA Civil is focused on the construction of facilities for water and
wastewater treatment, power and traffic/mass transit infrastructure. The
business unit has about 4,500 employees and operations in the eastern US,
Colorado and California. Skanska USA Civil's revenues amounted to about USD 1.6
billion in 2007. In the United States, Skanska is a leading provider of
comprehensive construction services and a developer of public-private
partnerships.

Certain statements in this news release constitute "forward-looking statements"
within the meaning of the Private Securities Litigation Reform Act of 1995. Such
forward-looking statements involve known or unknown risks, including those
detailed in the Company's filings with the U.S. Securities and Exchange
Commission, uncertainties and other factors which may cause the actual results,
performance or achievements of the Company, or industry results, to be
materially different from any future results, performance or achievements
expressed or implied by such forward-looking statements. Readers are cautioned
not to place undue reliance on these forward-looking statements, which speak
only as of the date hereof.

                                      ###



Contacts:


Matter Communications                                     Clean Diesel Technologies, Inc.
(Technical press inquiries)                               Ann Ruple
Jacqueline Volovich                                       CFO
[phone] x236                                      [phone]
[e-mail]                                      [e-mail]


Crescendo Communications, LLC                             Charles Stanley Securities
(U.S. investor contact)                                   Nominated Adviser
David K. Waldman / Klea Theoharis                         Philip Davies / Freddy Crossley
[phone]                                           Tel: [phone]
[e-mail]


Innovator Capital Limited                                 Skanska USA Civil
(Financial press inquiries)                               Karen Diemer
Shaun Brown / Jade Summer                                 Communications Manager
[phone]                                          718 746 2785
[e-mail]                         [e-mail]





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