Deforestation

See w:deforestation.

Deforestation is a bad thing and figures in some worst cases. Unfortunately, it's hard to imagine how threats could exist, other than "all forests disappear and all things on Earth die as a direct result".

Charcoal and tantallum are things whose creation often cause deforestation. When they do, this makes the charcoal and tantallum also bad things, as the comprehensive outcome of their production is beyond what is acceptable for a healthy buying infrastructure.