en acid rain (n, state)
― IsA ⟶
Weight: 2.0
en air pollution (n, state) Source: Open Multilingual WordNet
en acid rain (n)
― IsA ⟶
Weight: 1.0
en rain (n) Source: OpenCyc 2012
en acid rain (n)
― IsA ⟶
Weight: 1.0
en acid precipitation (n) Source: OpenCyc 2012