This damage is occurring not just on the surface where we can see what's happening, but deep inside the natural food chain. Because our complex ecological systems include hundreds of thousands of species, the survival of any particular species is interdependent on all others. Thus, if any species or any environmental factors change, this variation is felt throughout the system.
就像自然界複雜的生態系包含千百種物種，這些物種彼此之間以食物鏈互相牽連，因此當改變了某一物種或某一環境因子，就會造成驚人的連鎖反應。