[CNN] What is a carbon passport?
The idea of a carbon passport centers on each traveler being assigned a yearly carbon allowance that they cannot exceed. These allowances can then "ration" travel.
This concept may seem extreme. But the idea of personal carbon allowances is not new. A similar concept (called "personal carbon trading") was discussed by UK Parliament in 2008, before being shut down because of to its perceived complexity and the possibility of public resistance.
The average annual carbon footprint for a person in the US is 16 tons — one of the highest rates in the world. In the UK this figure sits at 11.7 tons, still more than five times the figure recommended by the Paris Agreement to keep global temperature rise below 1.5 Celsius (2.7 Fahrenheit) above pre-industrial levels.
Globally, the average annual carbon footprint of a person is closer to 4 tons. But, to have the best chance of preventing temperature rise from overshooting 2 Celsius, the average global carbon footprint needs to drop to under two tons by 2050. This figure equates to around two roundtrip flights between London and New York.
Intrepid Travel’s report predicts that we will see carbon passports in action by 2040. However, several laws and restrictions have been put in place over the past year that suggest our travel habits may already be on the verge of change.