The answer is human activity. <span>The cause of changes comes from human activities, which, not
like natural damage, are relentless and exhaustive. Although most of this
deforestation is compelled by national and international economic forces, a major
proportion serves no long-term purpose; it results from sustenance activities
on a local level. Many of the effects from human-induced annihilation of the
rainforests are probably permanent within our time. The part of humans in the
deforestation of the world's forests is significant and extensive. Many
activities contribute to this loss as well as sustenance activities, logging, oil
extraction, fires, mining, war, commercial agriculture, cattle ranching,
hydroelectric projects, pollution, hunting and poaching, the collection of fuel
wood and building material, and road construction.</span>
