If you want to find a major source of transportation-related emissions, just look up. Aviation currently accounts for around 2 percent of global carbon emissions, and many analysts believe its share could triple by the middle of the century if projected growth in air travel occurs. But finding alternatives to fossil fuels has proven much more... Why liquid hydrogen may make sense for airplanes, replacing jet fuel
If you want to find a major source of transportation-related emissions, just look up. Aviation currently accounts for around 2 percent of global carbon emissions, and many analysts believe its share could triple by the middle of the century if projected growth in air travel occurs. But finding alternatives to fossil fuels has proven much more...