[The origins of environmental problems].
Voeiko
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EV
D003247:Conservation of Natural Resources / Q000191:economics / Q000266:history / Q000331:legislation & jurisprudence; D017753:Ecosystem; D004777:Environment; D016468:Forestry / Q000191:economics / Q000193:education / Q000266:history / Q000331:legislation & jurisprudence; D049673:History, 20th Century; D011634:Public Health / Q000191:economics / Q000193:education / Q000266:history / Q000331:legislation & jurisprudence; D012426:Russia / Q000208:ethnology; D014197:Trees; D014857:Warfare