Planting trees is a good idea, but it may not have the effect that many expect. A recent modeling study showed that it is completely unrealistic to plant enough trees to offset the carbon dioxide emissions from human activities as they are now - new plantings would have to cover such vast areas that it would "destroy most natural ecosystems." or would lead to a reduction in food production. Even with emission reductions under the Paris Climate Agreement, natural ecosystems will still need to be replaced in an area that accounts for more than a third of the world's forests. The most viable option associated with trees will require both "ambitious" emission reductions and improved forest management.as well as CO2 collection.
This does not mean that humanity is doomed if this predictive model is accurate. However, it reinforces the idea that any solution to reduce emissions is likely to be comprehensive and involve more than just greening.
For researchers, this includes both reducing the consumption of natural energy resources and introducing various methods to reduce CO2 levels in addition to planting trees. An example could be more efficient use of available land by reducing food waste. Reforestation is still important, but it’s just one piece in a larger puzzle that could include everything from smart farming to solar energy.
Sergey Lukavsky