s:618:"TI Guidelines for REDD+ Reference Levels: Principles and Recommendations AU Angelsen, A. AU Boucher, D. AU Brown, S. AU Merckx, V. AU Streck, C. AU Zarin, D. AB This report proposes guidelines for developing REDD+ reference levels (RLs) under the United Nations Framework Convention on Climate Change (UNFCCC).1 It identifies principles that should be adhered to, the steps that must be taken, the data that will be required, and shows how the data can be analyzed to produce scientifically credible estimates of historic GHG emissions and removals from forests, which can then be used to project RLs. ";