It is well documented how private jets can produce a high amount of CO2 compared to travelling on a normal commercial flight. However, there are sometimes very good reasons why business people and celebrities take advantage of the flexibility and personal safety/security benefits of using private jets. Therefore, is it unfair to then brand people as anti-green just for this one action when in some cases they have done a number of positive things for the environment. Or, is it important that they practice what they preach and this mode of transport is an unnecessary luxury.