I apologise if I have risen too soon; I look forward to hearing what the noble Viscount is about to say. It is true, is it not, that there is a time lag between our emissions and changes in temperature? We are therefore likely to have a 30 to 40-year period in which we know we have committed ourselves to higher temperatures, and yet we are waiting for the impact. That surely means that we should be concerned sooner, rather than later. Secondly, does the noble Viscount not acknowledge that a global average temperature rise of 1 degree would be double that in the Arctic? A 2 degree global rise would therefore be 4 degrees in the Arctic, which could have a significant impact on the melt, leading to sea level rise.