Carbon offsetting isn't a solution. There needs to be less CO2 emissions. Offsetting doesn't make up for it.
Burning a trees worth of fossil fuel in a minute can be offset by planting a sapling that takes 20 years to consume that doesn't make up for the damage done. That's 20 years before your CO2 is compensated for.
During those 20 years that CO2 is melting ice caps causing more heat absorption heating the planet further.