Most reaction say it's about fertiliser. Is that a fact ? The interesting about that is that most land can not produce anymore without fertiliser, or very little. Because they use the same land over and over again. It's exhausted. Put that together with more natural disasters, like hurricanes and floods, forst fires. And it can effect the global food supply in a dramatical way. And that's bad news for the forests we have left today. Because if you can not use the land every year anymore, we need much more land. And what is left, rain forests, national parks...... Time to stop growing the world population i think.