MPs passed the Civil Aviation Bill, which deals with the regulation of the UK's major airports, including the legislative framework of the Civil Aviation Authority (CAA), on 20 November 2012.
On 7 November in the House of Lords, the government agreed to accept a Labour demand to require the Civil Aviation Authority to have a greater duty to take account of the environmental effects of the airports it regulates.
Transport Minister Simon Burns said ministers had listened to peers' concerns on the subject.
"We have always been clear that airport operators, whether or not they are subject to economic regulation, should be able to invest in appropriate environmental measures," he told MPs.
Shadow transport minister Jim Fitzpatrick said: "This is essentially a good bill. It could have been even better but at least as result of the good sense of our friends in the Lords, it is in better shape now."
The bill also confers certain aviation security functions on the CAA.
MPs approved without a vote all amendments that were agreed by the Lords, and the bill will now be given royal assent.