Toronto, Ontario - July 28th, 2008 - Forterra Environmental Corp. (TSX VENTURE:FTE), releases findings of University study that worm castings increased mushroom growth 20%. The University of Guelph, in a July 8, 2008 study, concluded that using worm castings as a partial substitute for peat moss in mushroom production resulted in 20 percent more mushrooms grown per square meter.

The university's study was financially supported by Forterra Environmental Corp., an emerging leader in the production and sale of premium organic soil-enrichment products based on worm castings. The study also found that using worm castings as a top dressing with peat moss can result in a five percent increase in yield (weight of the mushrooms). A tradeoff can be made, however, between the number of mushrooms grown per square meter and yield. Subject to how the growing is managed, including the frequency of pickings, yield could be further improved by capitalizing on this increase in mushroom numbers.

The university's report also said that, "The data suggest the worm castings may enable the mushrooms to remain on the growing shelf longer providing a better opportunity for staggered harvesting" and also that the "data empirically, suggest that solids may increase as a function of an increase in the amount of worm castings in the casing up to 30 percent."

Mushrooms are a significant vegetable crop in Canada and the United States. In 2006, Ontario mushroom farmers produced 61 percent of the mushrooms grown in Canada or 118 million pounds with a farm-gate value of $172 million.

"This study by the University of Guelph's agricultural experts is further third-party confirmation of the value of worm castings as an enrichment product to produce higher agricultural yields. It should further our marketing of Forterra's products to the mushroom-growing industry and should be of interest to other agricultural sectors," said Rick Denyes, Forterra's President and Chief Operating Officer. "As we continue to ramp up our production levels of solid and liquid worm castings products, we also are increasing our marketing and sales efforts."

About Forterra Environmental Corp.

Forterra manufactures and markets powerful and environmentally friendly soil
enhancers, using worm castings, which boost fertility while restoring the soil
with organic matter for sustainable, longer-term benefits, including stronger
root growth, and drought and pest resistance. Forterra products contain only
organic material. They are ideal for golf courses, sports fields, lawn care,
parks, nurseries, orchards, and vineyards. Forterra produces commercial
quantities of premium worm castings year round at its Toronto plant.
Essentially, Forterra uses red wriggler worms to convert organic waste into
vermicompost or worm castings. Worm castings contain micronutrients, which are
required for healthy plant development. Worm castings also contain microbes,
which increase the rate at which plants take up available macronutrients and
micronutrients.

About the University of Guelph

The University of Guelph, in Guelph, Ontario, is ranked as one of
Canada's top comprehensive universities because of its commitment to
student learning and innovative research. It is dedicated to cultivating
the essentials for our quality of life - water, food, environment, health,
community, commerce, culture and learning. Agricultural Science is a focus
of the university. The university is a global leader in innovative life
sciences education and research for the environment, agriculture, food, and
rural communities. The university's mandate is to deliver world-class
education, research, and innovation that meet the needs of contemporary
society.

Forward-Looking Statements

This news release contains forward-looking statements based on current
expectations. These forward-looking statements entail various risks and
uncertainties that could cause actual results to differ materially from those
reflected in these forward-looking statements. Such statements are based on
current expectations, are subject to a number of uncertainties and risks, and
actual results may differ materially from those contained in such statements.
These uncertainties and risks include, but are not limited to, availability of
resources, competitive pressures, changes in market activity, and regulatory
requirements. Risks and uncertainties about Forterra's business are more fully
discussed in the company's disclosure materials, including its annual
information form and MD&A, filed with the securities regulatory authorities in
Canada. Forterra assumes no obligation to update any forward-looking statement
or to update the reasons why actual results could differ from such statements

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this release.

For further information:
Richard W. Wertheim
Wertheim + Company Inc.
Email: wertheim(at)wertheim.ca
Phone: (416) 594-1600, (416) 518-8479 (cell)