Topic
Mountain, warming-warning-signs, mountains importance, mountains changes, high mountain distribution
3
Tundra, greenhouse gases, melting ice & snow, warming - Arctic Ocean, vegetation cover - tundra, tundra ecosystem, last ice age, shrub vegetation, predominant grasses, mosses and lichens
3
Mountain
1
Tundra
1
greenhouse gases
1
high mountain distribution
1
last ice age
1
melting ice & snow
1
mosses and lichens
1
mountains changes
1
mountains importance
1
predominant grasses
1
shrub vegetation
1
tundra ecosystem
1
vegetation cover - tundra
1
warming - Arctic Ocean
1
warming-warning-signs
1