Zoonotic diseases - which jump from animals to humans - are increasing and will continue to do so without action to protect wildlife and preserve the environment, UN experts have warned.
They blame the rise in diseases such as Covid-19 on high demand for animal protein, unsustainable agricultural practices and climate change.
Neglected zoonotic diseases kill two million people a year, they say.
Covid-19 is set to cost the global economy $9tn (£7.2tn) over two years.
Ebola, West Nile virus and Sars are also all zoonotic diseases: they started in animals, and made the jump to humans.
Report says that the jump is not automatic. It is driven, according to the report by the United Nations Environment Program and the International Livestock Research Institute, by the degradation of our natural environment - for example through land degradation, wildlife exploitation, resource extraction and climate change. This alters the way animals and humans interact.
Source: BBC