Could diamonds be the key to saving the planet?

Could this be just a stupid question to ask?

Well, unless you ask some scientists at ETH of Zurich who are exploring an ambitious geoengineering proposal that involves sprinkling diamond dust into the stratosphere to reflect sunlight and slow global warming.

It sounds like something out of a sci-fi novel, but the concept—known as stratospheric aerosol injection—has caught the attention of climate researchers.

The price tag?

A staggering $175 trillion.

Is this feasible? You already guessed it.

Are there other geoengineering solutions we might explore?