Infographic illustration depicting the biggest threat's to Earth's biodiversity. Over the past few decades the variety of life on Earth has decreased significantly. Between 1970 and 2016, it is estimated that the population of vertebrate species fell by 68% on average worldwide. The biggest cause, as a proportion of threat, are changes in land and sea use (50%). Species overexploitation (24%), invasive species and disease (13%), pollution (7%) and climate change (6%) are also significant factors. Data based on the WWF?檚 Living Planet Report 2020.