When it comes to flying, things really have to change. Flights produce greenhouse gases, mostly carbon dioxide (CO2), by burning fuel, which contributes to global warming. Aviation is responsible for about 2 per cent of the world's global carbon emissions, according to the International Air Transport Association.
In fact, the International Civil Aviation Organization (ICAO), the UN's civil aviation body, calculated that an economy-class return flight from London to New York emits an estimated 0.67 tonnes of CO2 per passenger. That's equivalent to 11 per cent of the average annual emissions for someone in the UK or about the same as those generated by someone living in Ghana for over a year.