Researchers track the worldwide populations of almost 32,000 species of animals and report their data in multiple ways. One number they report is called the Living Planet Index. In 2022, researchers reported that the Living Planet Index has shown a worldwide animal population decrease of 69% since 1970, with declines taking place in every year studied. Researchers have determined that multiple ecosystem factors contribute to the ongoing decline in populations. They believe loss of clean water, loss of habitat, barriers to migration routes, industrialization, overuse of resources, and climate change have all contributed to population declines.Data from Living Planet Report 2022, World Wide Fund for Nature.a.
How has biodiversity changed since 1970?(1 point)
1.Biodiversity has increased.
2.Biodiversity has decreased.
3.Biodiversity has stayed the same.