If I hunt 20 days in the winter that is at 80 of them I am tossing in a landfill.
They are charcoal, iron, cellulose with a bit of water and salt. You can dump them on the ground and enrich the soil with them - no need for the landfill except for the pouch and packaging.
"If you look through your scope and see your shoe, aim higher."
-- said to me by my 11 year old daughter before going out for hogs 8/13/2011