A promising development for the future is sustainable aviation fuel (SAP). Developed by the Air France KLM Martinair consortium it reduces CO2 emissions, and cleaner air transport contributes to lessening global warming.
It
is a good start since airplanes are major transportation culprits
increasing air pollution and radiative forcing. The latter being the
heat reflected back to earth when it is greater than the heat radiated
from the earth. All of which should incline the environmentally
conscious to avoid airplane travel -- buses and trains pollute less and
might be a preferred alternative for domestic travel.
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