Tuvalu could be underwater within 100 years. How could virtual reality help?

At the UN's 2021 climate change conference, Tuvalu's Foreign Minister delivered his speech from the ocean to stress the threat his country faces. (Reuters)

It's a question that's both tragic and hopeful: if a country stops existing physically, can it continue to exist digitally?

Thanks to climate change, this curious question is becoming an essential one – and some countries have already started trying to answer it.