OK, reducing greenhouse emissions is a noble goal and I can certainly see why the other members of the G8 summit might not like the idea of the US wanting to leave greenhouse emissions out completely.
However, setting a cap on temperature increase? At what point did we determine we have that much control on global temperatures? None of this global “consensus” on climate change has determined exactly how much temperature increase is contributed by carbon emissions, they have simply come to the conclusion that we are somehow contributing to certain measurements, with terms like “likely”, “somewhat likely”, “very likely,” etc.
Do they intend to simply treat it like a thermostat? Lower emissions and the temperature will automatically stop going up?