Eh, if you are talking about impact of climate change on agriculture, <i>of course</i> this is worth mentioning, and most sane sources do.<p>For example, quoting IPCC report &quot;Climate Change 2014: Impacts, Adaptation, and Vulnerability&quot; chapter 7, &quot;Evidence confirms the stimulatory effects of carbon dioxide (CO2) in most cases on crop yields (high confidence)&quot;.