This paper analyzes the relationship between greenhouse gas (GHG) emissions and the financial performance of business-to-business (B2B) or business-to-consumer (B2C) organizations. We find that Tobin's q is positively associated with higher GHG emissions for B2B firms, implying that GHG emissions reduction is regarded as a necessary cost. Meanwhile, a negative relationship is found for B2C firms, which may be due to consumers responding to climate change issues. These findings contribute to our understanding of the heterogeneous relationship in the existing literature. The evidence also implies on the policy level that more stringent regulatory pressure may be required for B2B firms to reduce their GHG emissions.