Just want to note that while 2/3 sounds like a lot it only refers to the CO2 released so far, not the future emissions, which keep increasing exponentially. There is no alternative to eliminating emissions. Having said that, sure, let's plant more trees.
edit: just to add some numbers for the context.
> Once mature, these new forests could store 205 billion tonnes of carbon: about two thirds of the 300 billion tonnes of carbon that has been released into the atmosphere as a result of human activity since the Industrial Revolution.
Given the current emissions rate of ~10Gt (assuming no increase), the amount captured by these new trees will be re-added in just 20 years, and will keep growing afterwords.
edit: just to add some numbers for the context.
> Once mature, these new forests could store 205 billion tonnes of carbon: about two thirds of the 300 billion tonnes of carbon that has been released into the atmosphere as a result of human activity since the Industrial Revolution.
Given the current emissions rate of ~10Gt (assuming no increase), the amount captured by these new trees will be re-added in just 20 years, and will keep growing afterwords.