natu - non-
- natural air pollution
- natural air pollution source
- natural alkalinity
- natural area
- natural area of preferential protection
- natural area of protection
- natural assets
- natural assimilation capability
- natural atmosphere
- natural background
- natural background radiation
- natural barrier
- natural body
- natural boundary
- natural calamity
- natural capital
- natural catastrophe
- natural chlorine
- natural community
- natural compound
- Natural Conservancy
- natural conservation law-making
- natural conservation mapping
- natural constituent
- natural corrosion
- natural cover
- natural degradation
- natural deposit
- natural disaster
- natural disaster reduction
- natural disasters and other disaster situations
- natural discharge
- natural draft cooling tower
- natural drainage
- natural drainage area
- natural drainage system
- natural ecosystem
- natural enemies
- natural environment
- natural environment rehabilitation
