Comment by jeffbee
Right, this new estimate can be useful for decision support: if we plant X acres, how much CO2 would it absorb? It's not very important outside of that, and it cant have caused significant past errors because to date humans have not undertaken large-scale planting for CO2 absorption reasons.
Several countries have implemented large-scale planting efforts: China, Ethiopia, India, Brazil, Australia, Pakistan, and Turkey to name a few. In 2019, Ethiopia claimed to have planted over 350 million trees in a single day as part of a broader initiative to plant 4 billion trees within a year to fight climate change.