VR makers turn Sundance green

When consumers get excited about advances in virtual reality, they are usually thinking about videogaming, new and immersive movie-watching or - let's face it - pornography.

But a number of projects presented at the Sundance Film Festival have a loftier goal in mind - saving the planet.

The annual get-together for indie filmmakers and fans in the Utah mountains is focusing on climate change, with numerous virtual reality experiences among the usual slate of features and documentaries.