of everything, isn t it? - if we re not green, - if we re not sustainable, then everything is going to fall apart i guess in the future. - i mean, there s so much fuel used with the aeroplanes, there s so much. so many resources i required for an airport for everybody to fly around. it has to be as green as possible. i don t really think about it that much but my grandma goes on about it a lot. what kind of world will we live in in 20 years time? all these things are happening already, what kind of world will be left for our children and our grandchildren? politicians on the doorstep and round the world are making decisions that will help to determine the future. roger harrabin, bbc news. britney spears dad has agreed to step down as the singer s conservator, which gave him control over her estate. jamie spears took charge of his daughter s affairs in 2008, following concerns over her mental health. he s promised an orderly transition to a new legal arrangement but hasn t indicat