What are your suggestions? 15% is leaps and bounds better than what anyone but Jay Inslee has suggested. Anyway that’s goddamn AMAZING for a single country.
Also, 12 years is the best case estimate. The worst case is in the past, and I’ve seen good qualified arguments for at most ~4 years before irreversible climate collapse with current technology (the figure I am citing is from speculation that high CO2 levels inhibit cloud formation, but I can’t find the source at the moment, so I encourage your own research to clarify my numbers). We need to try anything and everything in some reasonable order.
And our climate predictions are just that, predictions. And they can definitely change[1] when you’re talking about geological time, though we often accept them as some sort of gospel.
1. https://www.dailywire.com/news/48287/national-parks-toss-sig...
Now a new deal which, even if 100% effective, would only reduce global CO2 emissions by... 15%?!?[3]. To make matters worse, we're 12 years away from point of no return, but we're stubbornly refusing to build a new nuclear power plant even though things are so dire? It strikes me as unserious, happening only for show or other reasons.
1. https://www.weforum.org/agenda/2018/06/90-of-plastic-polluti... 2. https://www.sacbee.com/news/politics-government/capitol-aler... 3. https://cdiac.ess-dive.lbl.gov/trends/emis/top2014.tot