Earth and Planetary Sciences
China
75%
Mining Engineering
50%
Utilization
50%
Input
37%
Sediment
37%
Sediment Core
25%
Bronze Age
25%
Time
25%
Weapon
25%
Lead
12%
Lacustrine Deposit
12%
Isotopic Analysis
12%
Trace Metal
12%
Industrial Development
12%
Investigation
12%
State
12%
Rapid
12%
Tool
12%
War
12%
Record
12%
Trend
12%
Emission
12%
Ratio
12%
History
12%
Province
12%
Accumulation
12%
Civilization
12%
Segment
12%
Copper
12%
Bronze
12%
Physics
Metals
100%
Utilization
50%
Region
12%
Metal
12%
Emission
12%
Ratios
12%
Copper
12%
Lead
12%
Accumulations
12%
Engineering
Mining
50%
Lakes
37%
Weapons
25%
Environmental Impact
12%
Gas Fuel Manufacture
12%
Industrial Development
12%
Subsurface
12%
Deep Layer
12%
Surfaces
12%
Elements
12%
Significant Increase
12%
Chemistry
Concentration
50%
Mining
50%
Time
25%
Trace Metal
12%
Surface
12%
Atom
12%
Economics, Econometrics and Finance
Concentration
50%
Environmental Impact
12%
Trend
12%