RCP8.5, the scenario defined in the article as "worst case", is that the global air would have >1000ppm, looking at the referenced graph i'd guess it could go up to 3000ppm or more. A co2 detector warns if you have 1500+ ppm, where some people start to get headache and you should start ventilating your room. Imagine that 24h a day, on every place on the earth. Not to mention the effects of heating of 3.0°C to 5+°C .
RCP 4.5 is really bad as well. In our last project it was kind of the worst case scenario we considered. It means that rich countries will have problems adapting to the changing environment. The changes will happen so fast (20 Years), no new infrastructure can be built to prevent natural disasters (for example dam's). Poor countries have even less possibilities to adapt. For example countries like Kazachstan completely rely for it's water resources in summer on glaciers. In Switzerland we already know that all glaciers will disappear or melt by 80% to 90% in all likely scenarios.
edit: please correct me if i'm wrong, i am a designer that worked in climate visualsation research projects. However my short searches for the outcomes of rcp 8.5 are disastrous and no relief at all that it's now unlikely to come.
https://climatenexus.org/climate-change-news/rcp-8-5-busines...
RCP 4.5 is really bad as well. In our last project it was kind of the worst case scenario we considered. It means that rich countries will have problems adapting to the changing environment. The changes will happen so fast (20 Years), no new infrastructure can be built to prevent natural disasters (for example dam's). Poor countries have even less possibilities to adapt. For example countries like Kazachstan completely rely for it's water resources in summer on glaciers. In Switzerland we already know that all glaciers will disappear or melt by 80% to 90% in all likely scenarios.
https://ethz.ch/de/news-und-veranstaltungen/eth-news/news/20...
edit: please correct me if i'm wrong, i am a designer that worked in climate visualsation research projects. However my short searches for the outcomes of rcp 8.5 are disastrous and no relief at all that it's now unlikely to come.