There is much work to be done. This chapter sets out a list of five proposed environmental taxes. This is by no means a comprehensive list of worthwhile environmental taxes. What else don’t we know? These are five of the most important externalities to price. Some of these taxes have multiple effects. In fact, some of the effects overlap across different taxes. Some account can be made for overlap, so as not to double tax the same harmful activity, except of course for multiple harms. Each tax is described briefly, along with some discussion of the harms and the implementation and enforcement issues. Each proposed tax is worthy of a book-length discussion, but my purpose here is to introduce the need for the tax, and to lay out a roadmap for implementation, hoping the reader will forgive the omissions necessitated by considerations of space.