Memorandum for the Petitioners \ 34 How the level of global warming affects impacts and / or risks associated with the Reasons for Concern ( RFCs ) and selected natural, managed and human systems Five Reasons For Concern ( RFCs ) illustrate the impacts and risks of different levels of global warming for people , economies and ecosystems Purple indicates very high risks of severe impacts/ risks and the presence of significant irreversibility or the persistence of climate - related hazards, combined with limited ability to adapt due to the nature of the hazard or across sectors and regions. Impacts and risks associated with the Reasons for Concern ( RFCs ) Very high - i . k5 impacts/risks Moderate r Undetectable Unique and threatened systems Distribution of impacts Extreme weather events Global aggregate impacts Large scale singular Level of additional Impact / risk due to cllmatechange events corals Mangroves Small - scale low latitude fisheries Arctic region Terrestrial ecosystems flooding Fluvial flooding Crop yields change with at least medium confidence. White indicates that no impacts are detectable and attributable to climate change. , 10OG 201S 1« Warm - water Red indicates severe and widespread impacts/risks. Yellow indicates that impacts/risks are detectable and attributable to climate Tourism Heat - related morbidity and mortality . Confidence lev*! for transition: l- Low MiMedium, fV - High and WV *- Very high Figure 2: How the level of global warming affects impacts and/or risks associated with the Reasons for Concern ( RFCs) and selected natural, managed, and human systems109 109 IPCC 1 .5°C SR SPM, available at https://www.ipcc.ch/ srl 5/graphics/ ( last accessed on 12 September 2019).