A "linear city" project funded by the Saudi Arabian government called The Line is making some Utopian promises against sprawl and pollution, but is attracting critics who think it sounds more like a dystopia.
As the world's climate change crisis shows more worrying signs each year, scientists throughout the world have pondered solutions to either prevent or mitigate the effect of climate change on future generations.
And while some of the resulting ideas concern small-scale products aimed to make life easier as things get worse, others are presenting themselves as a way to protect some semblance of biodiversity in the wake of mass extinctions.
Just these examples should give you a sense of how much prospective solutions to climate change vary in scope and ambition, but none seem as ambitious as one project coming out of Saudi Arabia.
But as we'll soon see, ambition isn't quite everything.
