28 miles in a car (~300g per mile) = 1 tree
3 course meal for two = 16kg = 3 trees
Overnight stay in a hotel - 22kg = 4 trees
Short haul return 101 g per mile = 12 trees
Email with attachments = 50g
2 mins on your phone a day = 40g
Average CO2 per person to offset their life is ~11 tonnes = 1870 trees