Flying is in general the most carbon intensive way to travel per mile. Private plane travel is at an all time high; demand continues to outpace supply, and it's more accessible than ever.
You've seen the headlines: celebrities' love of private air travel is an environmental nightmare. Yet as the ultra rich enter image-recovery mode--shifting responsibility to sponsors, friends, and renters--it's still business as usual when it comes to flights by private jets. 1
Researchers pinpoint a potential guideline: to keep things sustainable, everyone on Earth should limit their carbon footprint to a grand total of 2.3 metric tons per year. As for a private jet? It emits 2 metric tons of carbon dioxide per hour. To put one ton of carbon emissions into context, it's equivalent to driving the circumference of the Earth one time. 2