Physics & Astronomy
Colombia
100%
volcanoes
83%
ecosystems
80%
coffee
60%
acids
52%
soils
36%
hydrogen chlorides
25%
leaves
24%
leaching
22%
rain
22%
acid rain
21%
sulfates
18%
slopes
17%
water
16%
acidity
16%
sulfur dioxides
15%
precipitation (chemistry)
13%
falling
11%
chlorides
11%
potassium
11%
land use
9%
gases
8%
vegetation
8%
vents
8%
sulfuric acid
7%
ashes
7%
volcanic eruptions
7%
silica glass
6%
hydrogen ions
6%
nitrates
6%
plumes
5%
stations
5%
dissolving
5%
chemistry
4%
cations
4%
silicon dioxide
4%
ions
2%
Earth & Environmental Sciences
terrestrial ecosystem
58%
aquatic ecosystem
55%
coffee
48%
volcano
48%
acid
36%
plantation
31%
thermal water
28%
chloride
22%
hydrogen
17%
soil
14%
acid rain
13%
rain
13%
leaching
13%
sulfate
12%
sulfur dioxide
11%
acidity
11%
potassium
9%
silica
9%
gas
8%
ion
7%
precipitation (chemistry)
7%
acid deposition
7%
throughfall
7%
ecosystem
6%
sulfuric acid
5%
acidification
5%
volcanic eruption
4%
cation
4%
ash
4%
plume
4%
glass
4%
dissolution
4%
nitrate
4%
land use
3%
vegetation
3%
station
3%
water
1%
effect
1%
Chemical Compounds
Ecosystem
69%
Soil
49%
Leaf Like Crystal
33%
Hydrogen Chloride
32%
Acid Precipitation
28%
Sulfate
21%
Sulfur Dioxide
21%
Acid
20%
Throughfall
19%
Leaching
17%
Gas
15%
Chemistry
11%
Chloride
11%
Nonequilibrium
10%
Sulfuric Acid
8%
Drop
8%
Ion
7%
Nitrate
7%
Dissolution
7%
Amorphous Material
6%
Glass
6%
Cation
5%
Hydrogen
4%
pH Value
4%
Surface
3%