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Image caption How can airlines reduce carbon emissions while air travel continues to grow so fast? The aviation industry is under pressure to reduce carbon emissions, yet air travel continues to grow in popularity around the world. Can technological innovation help square this circle, or should we simply fly less often? Once a byword for innovation and progress, many people now view aviation as dirty and dangerous to the environment. It contributes about 2% of the world's global emissions, and this is set to rise. IATA, the airline trade body, predicts that passenger numbers will double to 8.2 billion a year by 2037. Planemaker Boeing forecasts there will be demand for 42,700-plus new air... Full story

10 May