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67
terms
ultrafiltration
ultrasound
ultraviolet radiation
UNCED
uncontrolled dump
underground disposal
underground dump
underground quarry
underground railway
underground storage
underground train
underprivileged people
undertaking business
underwater outlet
unemployment
ungulate
United Nations
unleaded petrol
unsupervised image classification
upbringing
Upper House
uranium
urban action program
urban area
urban community
urban concentration
urban decay
urban design
urban development
urban development document
urban development law
urban ecology
urban ecology charter
urban ecosystem
urban facility
urban flows (resources)
urban green
urban habitat
urban landscape
urban management
urban noise
urban planning
urban planning and development
urban policy
urban pollutant
urban pollution
urban population
urban renewal
urban sanitation
urban settlement
urban sprawl
urban stress
urban structure
urban study
urban traffic
urban wastewater
urban water
urban water supply
urbanisation
ursid
use of leisure time
use of waste as energy source
use of waste as material
used water
user advantage
utilisation of calorific value
utilisation of pesticides