Kọ itẹsiwaju fun paragirafi yii - Ni Oṣu Kẹwa ọdun 2018, onimọ-ọrọ ọrọ-aje Paul Krugman sọ pe "[t] o wa asopọ tuntun ti ibi: Russia, Saudi Arabia <unk> ati Amẹrika", awọn orilẹ-ede mẹta ti o kọ lati fọwọsi iwadi oju-ọjọ tuntun ti United Nations ni 2018 United Nations Climate Change Conference
ó ṣe tán.