Subject
accident
2
accident prevention
2
chemical industry
2
chemical plant
2
economics
2
microprocessor
2
C plus-plus (programming language)
1
Visual BASIC (programming language)
1
accident insurance
1
air cleaning
1
air pollution
1
aluminum
1
aluminum industry
1
bauxite
1
building material
1
business economics
1
carbon dioxide
1
chemical contamination
1
chemical explosive
1
chemicals
1
civil engineering
1
drinking water
1
energy economy
1
environmental economy
1
finance
1
growth
1
hazardous material
1
hydrological cycle
1
hydrology
1
language textbook
1
market economy
1
mathematics
1
method
1
national economy
1
object oriented programming
1
physical properties
1
politics
1
pollutant
1
pollution control
1
radioactivity
1
raw material consumption
1
raw material policy
1
recycling
1
soil
1
soil pollution
1
soil protection
1
trade
1
waste water
1
water
1
water quality
1