Commercial air transport is booming worldwide, but it is also accelerating dangerous climate changes. Next year, more than 150 airlines worldwide will fly 24,000 aircraft, burning 100 billion gal. of fossil fuel and spewing more than a billion tons of carbon dioxide (CO2) greenhouse gas into the Earth’s atmosphere. The industry’s longtime goal has been to cap emissions in 2020 near 2005 levels, then cut them in half by 2050. Scientists on the Intergovernmental Panel on ...


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