The document discusses including a long-term goal (LTG) of achieving net zero greenhouse gas emissions in the second half of this century in the 2015 Paris Agreement. It provides background on the science supporting this goal to limit warming to 2°C, and outlines widespread support for the LTG from countries, cities, businesses, and civil society. Specific proposals are made for including recognition of the LTG in the agreement through references in the preamble, a ratchet mechanism to increase ambition over time, and a program of action to support initiatives working towards net zero emissions. Overall the document argues that establishing a clear long-term direction of net zero emissions is important to guide national climate policies and investments over the coming decades to transition away from