<classify> Kusobala ngokwanele ukuthi umhlaba ushintshe kakhulu ngenxa yokuthuthuka kwabantu kwezesayensi nezobuchwepheshe, futhi izinkinga zibe zinkulu ngenxa yokugcwala kwabantu kanye nempilo yesintu yokuhlaphaza.  <topic>: Environmental_theory_and_collection_of_ideasEnvironmentalism_and_survival 