Skift Take
Calculating the actual environmental impact of flights has been an immature art. Getting real data from Lufthansa should advance the effort.
Accurately measuring the climate impact of individual flights has been a thorny issue because the science is inexact. For example, Google Flights last year controversially dropped the inclusion of contrails, the streaking ice clouds that trap heat as they trail aircraft in the sky. They don't contain CO2, but are believed to have a large effect on a flight's contribution to global warming.
Critics have argued that Google's current display of flight emissions greatly underestimate their environmental impact because they exc