Subject
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environmental significance
1
equipment
1
forest
1
forestry
1
global change
5
global warming
1
hazardous waste
8
human ecology
2
land use
1
library catalog
1
library science
1
metabolism
1
nature conservation
1
nuclear energy
1
ozone depletion
1
plant ecology
1
population
1
population growth
1
product
1
recycling
1
remediation
8
sampling
8
social aspect
1
soil
1
soil pollution
8
sustainable development
3
technology
4
terminology
2
traffic
1
transport
2
university matter
1
university research
1
waste
1
waste water treatment
1
water
1
water pollution
8
water pollution control
1
water resource
3
water treatment
8