This Global Challenges Report analyses the patent landscapes of four Climate Change Mitigation Technologies (CCMTs) (biofuels, solar thermal, solar photovoltaic (PV) and wind energy) to inform policy discussions by providing empirical evidence of innovation trends and technology ownership. A broad market analysis of renewables and their policy frameworks are discussed in Section 2, followed by the usual scope and methodology section. The individual patent landscape analysis for each of the CCMTs is given in Sections 4 to 7, identifying and analysing the range of patent activity, patent filings trends, top technology owners, patent concentrations, and market trends. Each of these sections also includes anecdotal case studies to illustrate various features of the technology marketplaces and to situate the patent data into the context of market activity and business strategies.