hi-v - hydr
- hi-volume sampler
- hiatus
- HIB
- hibernal snow level
- hibernating pond
- hibernation
- hibernation house
- hidden condensation
- hidden hunger
- hidden pollution
- hiemal
- hiemisylve
- hierarchy of ecosystems
- HIG
- high
- high active waste concentrate
- high albedo pollution
- high alcohols
- High Altitude Pollution Program
- high altitude pollution program
- high altitude research project
- high amenities
- high amenity
- high Arctic weather station
- high Arctic weather stations
- high atmosphere
- high bed
- high bog
- high bogs
- high calorific value
- high density area
- high density zone
- high dose
- High Ecological Council
- high energy radiation
- high environmental risk area
- high flood
- high flow
- high fog
- high forest