Planting trees is a popular method for carbon offsetting, as trees absorb CO2 as they grow, helping to mitigate greenhouse gas emissions. However, its effectiveness depends on several factors. 

The type of trees, the location of planting, and the long-term maintenance of the forest all play crucial roles. It's essential to plant native species that are well-suited to the local environment and to ensure that the area is protected and sustainably managed long-term. Additionally, tree planting should not be seen as a single solution but part of a broader strategy that includes reducing emissions. Concerns like monoculture plantations, displacement of local communities, and biodiversity loss also need to be addressed. 

When done responsibly and as part of a larger environmental strategy, tree planting can be an effective way to offset carbon.