how should we proceed? Individually, we can start daylighting such information but it also seems that a unified approach might be worth pursuing. This could well include dedicating publications to the topic (like the Journal of Sustainable Engineering, published by Taylor & Francis, which began in 2008) or designating sections of our existing geosynthetic conferences and publications like Geosynthetics magazine to covering this issue. Of course, discussion of any type is always welcomed, but we feel that some effort should be made to counter the ever-increasing news that "all plastics are bad." G Case History Traditional Approach Cost (K) CO2 Footprint (tons) Geosynthetic Approach Cost (K) CO2 Footprint (tons) Slope Stability $571 157 $23 21 Bridge Approach $1,282 500 $574 346 Crib Wall $51 35 $41 11 Sheet Piling Wall $246 433 $121 69 Concrete Wall $98 107 $20 20 Application Area No. Cases Described Average CO2 Savings Walls Embankments Armoring Covers Liners Retention Drainage Pipe 6 4 4 3 2 3 3 25 69% 65% 76% 75% 30% 61% 40% 65% TOTALS TABLE 1 (TOP) Case studies from WRAP report (May 2009) TABLE 2 (BOTTOM) Case studies from GRI-24 Conference (March 2011) Unanswered questions can stop your project in its tracks. The GMA Techline puts you back in the fast lane. GMA Techline is your resource for technical questions about geosynthetics provided by IFAI's Geosynthetic Materials Association. Don't second guess, get expert advice. E-mail GMAtechline@ifai.com for fast, free and direct answers to your technical questions. GMAtechline@ifai.com Geosynthetic Materials Association www.GeosyntheticsMagazine.com 53http://www.GeosyntheticsMagazine.com