Basque is in the Under2 Coalition - they signed the 2015 Memorandum of Understanding , which asks for an 80+% reduction in GHG emissions from 1990 by 2050.

However, the Basque Country’s Regional Climate Change Strategy to 2050 aims to reduce greenhouse gas emissions by 80 percent by 2050 based on 2005 levels; 1990 is a stronger target so we use that.