The largest expanse of time on the geologic time scale is the eon. An eon is known to be a unit of geological of time in which this is equivalent to billions of years in which gave it the title of having to be the largest expanse of time in regards with the geologic time scale.
I think it would be
contaminates groundwater
pollutes the soil
finding locations for landfills
The animal would have to be a Lemming
