|Fires are natural - most of the time (click on image for larger view).|
Natural Global Fires
Many plants and animals have evolved to depend on fires periodically occurring in certain parts of the world. This phenomenon has been occurring for millions of years, successfully replenishing and rejuvenating the areas in which it is allowed to happen. The ashes enrich the soil, animal populations are re-balanced and new life springs into existence. Additionally, these fires do not reduce the amount of land on which forests grow, thereby preserving the ecosystems contained within (with no loss of forest land).
Unnatural Global Fires
Using the word 'unnatural' is always risky, but here it is meant to convey control by humans - which in itself is 'natural', but introduces many variables not before seen in history. Unlike natural fires which are beneficial, unnatural forest fires often have the opposite effect - especially when used to clear land of trees to make way for agriculture or construction. Over time, the number of trees decreases while the number of humans increases. More humans require more agriculture which means more deforestation.