The issue focused on how high up we should build our houses in Europe to avoid damaging the climate.But what would it take to address that problem?At the European Parliament in Strasbourg, member states will vote on whether to commit to meeting the carbon emissions reduction targets set out in the 1997 Kyoto Protocol.But when it comes to green buildings, there's been an unexpected twist.They want to change the rules on where they can build them.That has opened up the debate about whether there should be more green buildings