A cover member adapted to confine gaseous emissions from animal waste in a
waste collection area having a base for contacting and floating on at
least a portion of a surface of the animal waste and a cover with at
least one surface extending from the base. The cover member can include a
buoyant frame to define a generally pyramid shape. The cover includes a
layer of geotextile material and can include organic filter material with
the internal volume of the cover member. A plurality of cover members can
be closely aligned to cover a substantial portion of the surface of the
animal waste.