Air Canada wrote: "Flight AC991 from Toronto to Mexico City is
expected to generate at least 40 per cent fewer emissions by using jet fuel
derived from recycled cooking oil and through other fuel-saving measures,
making it the most environmentally-friendly flight ever flown by Air Canada.
The flight is supported by Airbus and is part of an environmental demonstration
by the International Civil Aviation Organization (ICAO) to coincide with the
Rio +20 United Nations Conference on Sustainable Development."
