If a landfill cover soil layer is properly managed to
improve its CH4 removal capacity, its role as a biological
sink for atmospheric CH4 emission can be enhanced.
Earthworm cast and powdered activated carbon (PAC)
may be suitable soil amendments capable of reducing
methane emissions to the atmosphere. Earthworm cast is
the digested organic materials from earthworm activity. It
was reported that earthworm cast had a better effect on
crop performance than compost and commercial amendments