Synthesis Energy Systems Slated to Join Russell 3000 Index

HOUSTON, June 24 /PRNewswire-FirstCall/ -- Synthesis Energy Systems, Inc. ("SES") , a global industrial gasification company, is scheduled to join the Russell 3000 Index when Russell Investments reconstitutes its indexes on June 27, 2008, according to a preliminary list of additions posted on http://www.russell.com/.

"We are pleased to be included in the Russell 3000 Index," stated Tim Vail, President and CEO of SES. "We believe our inclusion in the Index validates the significant progress we have made as the only publicly traded, pure-play gasification company and will broaden our visibility among the investment community."

Annual reconstitution of Russell's U.S. indexes captures the 3,000 largest U.S. stocks as of the end of May, ranking them by total market capitalization. Membership in the Russell 3000, which remains in place for one year, also means automatic inclusion in the large-cap Russell 1000 Index or small-cap Russell 2000 Index as well as the appropriate growth and value style indexes. Final index membership lists will be posted on the Russell web site on June 30, 2008.

Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for both passive and active investment strategies. An industry-leading $4.4 trillion in assets are currently benchmarked to them.

About Synthesis Energy Systems, Inc.

SES is an energy and technology company that builds, owns and operates coal gasification plants that utilize its proprietary U-GAS(R) fluidized bed gasification technology to convert low rank coal and coal wastes into higher value energy products, such as transportation fuel and ammonia. The U-GAS(R) technology, which SES licenses from the Gas Technology Institute, gasifies coal without many of the harmful emissions normally associated with coal combustion plants. The primary advantages of U-GAS(R) relative to other gasification technologies are (a) greater fuel flexibility provided by our ability to use all ranks of coal (including low rank, high ash and high moisture coals, which are significantly cheaper than higher grade coals), many coal waste products and biomass feed stocks; and (b) our ability to operate efficiently on a smaller scale, which enables us to construct plants more quickly, at a lower capital cost, and, in many cases, in closer proximity to coal sources. SES currently has offices in Houston, Texas and Shanghai, China. For more information on SES, visit http://www.synthesisenergy.com/ or call (713) 579-0600.

CONTACT: Ann Tanabe, Vice President of Investor Relations of Synthesis Energy Systems, Inc., +1-713-579-0600, Ann.tanabe@synthesisenergy.com

Web site: http://www.synthesisenergy.com/

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