Grass attack.
Williams
Nigel
N
D000818:Animals; D019306:Artemisia / Q000502:physiology*; D044822:Biodiversity; D002245:Carbon Dioxide / Q000502:physiology*; D002980:Climate; D003120:Colorado; D017752:Greenhouse Effect; D006801:Humans; D006109:Poaceae / Q000502:physiology*
D002245:Carbon Dioxide