bog clouds England english Great Britain habitat lake landscape marsh nature plants seep sky Surrey tree tussocks water wet active danger geothermal geothermally hot natural new zealand rock Rotorua sinkhole sulfur sulphur vapor vapour vent yellow articulated barrel barrels chemical chemicals contaminate contamination corrode corrosion dioxin drum drums dump ecology environment environmental garbage gas gasoline green industrial industry issue issues leak leakage lorry management metal oil petrochemical petrol poison poisonous pollute polluting pollution recycle refine refined refinery rust rusty seepage seeping semi spill stare storage substance technology toxic trailer transport transportation vehicle waste weirdvis cavern birds ducks formation boiling Mud pool bush shrub