This study examines the corporate environmental reports of 100 companies listed in the 2009 Fortune 1000 in order to illustrate how this type of genre communicates a green corporate ethos to audience members who are trying to distinguish between greenwashing tactics and true environmental concerns. The authors analyze how corporate environmental reports are constructed at macro and micro discursive levels to promote a socially responsible image to in-group (e.g., employees and stockholders) and out-group (e.g., consumers) members. The results of the analysis show how these reports use ideological persuasion to influence or change audience members’ opinions about corporate environmental sustainability.