All scientists agree that humans are a factor in the environmental changes, they just disagree on how much man has contributed. In my opinion, we are probably a significant factor in the equation. However, there are far more "third-world" nations than there are "first-world" nations and the third-world nations which have large populations, struggle with their growing needs and still rely on forests for building, more land for farming, as well as land for buildings to house small businesses to provide various services for the growing needs of those populations.
Humans chop down vast forest tracts for their needs while ignoring the importance of those very trees they destroy. They provide shade from the heat, absorb carbon dioxide for their growth, emit oxygen and provide habitats for animal and insect life.
Some scientists are now saying that for the earth to heal and remain healthy, two-thirds of the planet would have to return to its natural state and the human population significantly reduced.
The entire thing is complicated and there is no magic bullet. China tried the "one-child only" routine and that didn't pan out, as the fathers only wanted boys and when discovering that the fetus was a girl, they had them aborted and thus ended up with a significant male-female imbalance and other couples just kept having children, regardless of the law.
I think the whole thing will eventually rectify itself as our food resources are not able to keep pace with the growing population needs, massive numbers of people will just end up being starved out. Once the human population has been reduced through starvation, those that remain will no doubt take whatever measures they need to, to ensure that people limit the number of offspring they have.