In a video posted on social media on Saturday (May 22), Thunberg said the environmental impact of farming as well as disease outbreaks such as COVID-19, which is believed to have originated from animals, would be reduced by changing how food is produced.
"Our relationship with nature is broken. But relationships can change," Thunberg said in a video marking International Day of Biological Diversity.
A focus on agriculture and linking the climate crisis to health pandemics is a new angle for Thunberg, who has typically focused her ire on policy-makers and carbon emissions from fossil fuels.
"The climate crisis, ecological crisis and health crisis, they are all interlinked," she added.
75% of new diseases come from other animals, and this spill over to humans is caused by farming, Thunberg said, adding that a move to a plant-based diet could save up to 8 billion tonnes of CO2 each year.