More recently, as House minority leader, McCarthy proposed several environmental bills designed to address climate change, which have been described as "narrow" and "modest". They include provisions to extend a tax credit for carbon capture technologies, and to plant trees. Responses from Republican representatives were mixed. Conservative groups including the Club for Growth, the Competitive Enterprise Institute, and the American Energy Alliance opposed the measures, while others such as ClearPath supported them. McCarthy believes that younger voters are worried about climate change and cautioned that Republicans are risking their viability in elections over the long term by ignoring or denying the issue.