To face social and environmental problems generated by fossil energies, market-based solutions have emerged to tackle these challenges on a broader scale. These proposals are often also framed as a “green” approach to economic growth. They include e.g. regulatory disincentives for emitting CO2 through a form of carbon pricing or more specifically, emissions trading systems (ETS) and carbon taxes. Although their rationale sounds adequate, their design and implementation are flawed from different points of views and subsequently result in a minimal decrease of CO2 emissions. The following analysis will focus on the main causes of this (political) deficiency with a focus on Latin America. Maximiliano Proaño has the details.