How does human activity affect the state of the green cover of the planet?

Man has a strong influence on the plants of our planet. We need wood for our lives. Therefore, we are cutting down forests. This is not to say that deforestation is bad, because without timber we would not be able to live normally. But often this can affect our lives or the lives of animals. Scientists have already developed and implemented rules for deforestation and reforestation. Most of the developed sawmills in the world are engaged not only in deforestation and processing of forests, but also in their restoration and artificial creation of new forests.