Identify the rhetorical appeal:I’m turning 21 tomorrow and I…

Identify the rhetоricаl аppeаl:I'm turning 21 tоmоrrow and I just wanted to thank everybody for this world that my cohorts and I will be inheriting. Thank you for showing that productivity is clearly more important than sustainability, disregarding the truth that infinite growth is impossible. (Alex Wasburne, comment on Dot Earth blog)