Environmental Protection and Green Growth

I apologise to the House and to the Minister for asking to intervene when I have only just arrived. I hope that the House will forgive me. I have been at a meeting of the 1922 Committee. I congratulate my hon. Friend on the work that he has been doing. May I ask him to cast a particular eye over the very serious environmental problem of the gross over-extraction of water from rivers in general and in particular from chalk streams, which are waters of international renown and importance in this country? Will he tell us what level of extraction he considers acceptable?