TMX group

Stock symbol: CST
Outstanding shares: 26,530,779    

QUEBEC, Feb. 2 /CNW Telbec/ - On March 30, 2005, CO2 Solution inc.   
("CO2 Solution") and SiliCycle inc. ("Silicycle") announced an agreement for
the development of an industrial technique for enzyme attachment to a silica
substrate. It is important to point out that the enzyme is at the core of CO2
Solution's process.

After several months of hard work on the part of the two scientific
teams, the interim assessment of the results was completed last January 27.
For CO2 Solution, the results indicate that this development will provide
three major key elements:

- greater enzyme efficiency
- lower system costs
- better strategic positioning of its technology platform.

For SiliCycle, these results are promising in view of its strategy to add
new products to its existing line of products, which are sold in 30 countries.

REMINDER

The public offering is still underway and the closing date is scheduled
for next February 27th. Keep in mind that these shares are eligible for RRSP
and Quebec SME growth stock plan (100% tax return in Quebec).

About CO2 Solution

CO2 Solution is an environmental biotechnology firm that supplies
products and services related to CO2 management and reduction in a climate
change context.

About SiliCycle

The nature of SiliCycle's activities is based on the development,
production and marketing of innovative high-quality silica-based products that
meet the needs of a worldwide clientele.

The TSX Venture Exchange has neither approved nor disapproved the
information contained herein and accepts no responsibility for it.