§ Mr. Chris Smith
To ask the Secretary of State for the Environment (1) what level of chlorine loading in the stratosphere is regarded as the maximum that the United Kingdom will accept as a condition for signing a revised Montreal protocol in Copenhagen;
(2) what are the maximum periods of stratospheric chlorine loading (a) above 2ppbv and (b) above 3ppbv that the United Kingdom is prepared to accept as a condition for signing the revised Montreal protocol in Copenhagen.
§ Mr. Maclean
We will be pressing for the Montreal protocol's controls to be tightened to require the earliest possible phase out of ozone-depleting substances, in order to achieve the lowest possible level of chlorine loading in the stratosphere.