Climate change, for example, is often cited as a serious threat in this regard, because there is a feedback loop between species extinction and the release of carbon dioxide into the atmosphere.
氣候變化，例如，經常被援引作為一個嚴重的威脅在這方面，因為有物種滅絕和二氧化碳釋放到大氣之間的反饋迴路。