I am actually going net negative on landfill as I am re-using some of a couple of neighborhood businesses' scrap wood and fabric in our production. The scrap fabrics for wrapping are provided by Merrill Y. Landis http://www.merrilllandis.com/index.php.
Here is what wheat strand board looks like: 
To learn more about Microstrand Wheatboard, go to:
http://www.environbiocomposites.com/products.php
I think a holy icon should be a blessing in every way. As much as is possible, its physical form should not deplete natural resources or pollute.