Airily Dismissive?

Most people don't think too much about their carbon footprint when flying off on holiday or a business trip (and, I suspect, even fewer when investing in a commercial space hop which would produce a carbon 7-league bootprint). Given that, one would hope that the suppliers of air flights might take an interest in their plane's greenhouse gas release. Sadly, however, it appears that airlines generally turn their backs on the more fuel-efficient (but more expensive?) aircraft (https://www.theguardian.com/environment/2018/dec/08/airlines-ignoring-efficient-planes-carbon-targets-tui-airways-atmosfair-index-virgin-atlantic). As one might predict (given their enthusiasm for commercial space flight), Virgin Atlantic is reportedly one of the worst offenders.