How has human use of trees had both a positive and negative impact?

The humans have impacted the biodiversity in both positive and negative way. Due to urbanization, there is regular cutting down of trees which results in the decreased biodiversity and increased level of greenhouse gases due to deforestation. These are the negative impact of human use of trees.

The positive impact includes due to the cultivation of trees by the humans in order to harvest fruits, nuts and other products results in the increased in the population of these specific trees. The use of genetic engineering has also resulted in increased biodiversity of plant species.  

we would need to see the picture to answer it