Offsetting flights does not work. Of course, it is nice to protect woodland and jungles. But you just can't plant so many trees that it could replace a single, hour-long flight.
When a tree grows, it extracts some CO2 from the atmoaphere and stores it in its biomass. When it dies, this CO2 goes back into the atmosphere. When we use fuel for flying, we release hundreds of kilograms of CO2 into the atmosphere (for a short flight of a single person!), which have been stored over the course of hundreds of millions of years. A tiny bit of a tree that you plant today might become fossilized, but even if that happens it will only store an incredibly small amount of the carbon that is consumed.
It is quantitatively completely impossible to undo that by planting trees.
The only solution is, if at all possible, to stop flying, and use other means of transport, like electrical trains and buses. We can't have both mass air transportation and an alive planet.
When a tree grows, it extracts some CO2 from the atmoaphere and stores it in its biomass. When it dies, this CO2 goes back into the atmosphere. When we use fuel for flying, we release hundreds of kilograms of CO2 into the atmosphere (for a short flight of a single person!), which have been stored over the course of hundreds of millions of years. A tiny bit of a tree that you plant today might become fossilized, but even if that happens it will only store an incredibly small amount of the carbon that is consumed. It is quantitatively completely impossible to undo that by planting trees.
The only solution is, if at all possible, to stop flying, and use other means of transport, like electrical trains and buses. We can't have both mass air transportation and an alive planet.