As nature degrades and the environment becomes more polluted, economists frequently use tax tools to mitigate and control the negative externality of the problem. The Pigou tax is, of course, one of the most common environmental economic instruments. However, it seems that this is not the best solution to the problem because environmental pollution and climate change are becoming more and more serious. While I appreciate what economists who have done in devising policies over the last several decades, I believe their efforts are insufficient to solve the problem.