Flying once a year will, for most people, form a significant percentage of their total CO2 footprint. So cutting that in half by flying once every two years would already be a big improvement.
Flying 5000 KM apparently produces approximately 1 ton of CO2. The 2010 rate average CO2 footprint per capita was about 7 tons a year, and the goal by 2050, if we mean to have a reasonable chance of keeping warming by 2100 to less than 2 degrees centigrade from pre-industrial levels, is a bit over 2 tons. So if you fly at all, making a conscious decision to fly less will help.[1]
Yes, the requirements to meet that goal of sub-2-degree warming by 2100 are pretty severe.
Flying 5000 KM apparently produces approximately 1 ton of CO2. The 2010 rate average CO2 footprint per capita was about 7 tons a year, and the goal by 2050, if we mean to have a reasonable chance of keeping warming by 2100 to less than 2 degrees centigrade from pre-industrial levels, is a bit over 2 tons. So if you fly at all, making a conscious decision to fly less will help.[1]
Yes, the requirements to meet that goal of sub-2-degree warming by 2100 are pretty severe.
[1]http://shrinkthatfootprint.com/carbon-targets-for-your-footp...