Key factors contributing to the loss of biodiversity are overpopulation, deforestation, pollution (air, water and soil contamination) and global warming, which, combined, produce a cumulative negative impact on biodiversity.
生物多样性减少的主要成因是人口过多、毁林、污染（空气、水和土壤污染）和全球暖化，这些因素综合起来对生物多样性产生了累积负面影响。