This paper examines the performance of US stock portfolios constructed and rebalanced to have different environmental (EV) risk. EV risk is proxied by EV risk ratings from GES Investment Services. Portfolios with high EV risk generate higher raw returns than low EV risk portfolios, but when risk and other factors are controlled for using the three Fama-French factors and a momentum factor, the risk-adjusted returns of both high and low EV risk portfolios are not statistically different from zero. The evidence thus indicate that a portfolio of stocks with low EV risk, intended to be more responsible, neither underperform or outperform on a risk-adjusted basis.