Nevertheless it is clear that greater action is needed from all countries if we are to limit global temperature increases to well below 2Â°C. 3: UK climate action The UKâs current target is to reduce its greenhouse gas emissions by at least 80 per cent by the year 2050, relative to 1990 levels. This 2050 target was set to be consistent with keeping the global average temperature to around 2Â°C above pre-industrial levels with a 50 per cent likelihood.