How Can We Make It Easier for Funders to Find Effective Non Profits?

One of the ideas we've had is, how do we make it easier for other funders to find effective charities? We're one of the bigger oponents of carbon taxes. And so if you want to tax anything, taxing something with high externalities is the thing that economists get very excited about. I have a economic straining and so i get very excited by that,. Whether that externality is something tha ses pollution, or something that causes obesity, like sugar.