​Part thriller, part wake-up call, Plan C for Civilization reveals the hidden world of climate tech — and asks whether or not we can afford to ignore one of the most controversial ideas on Earth. ​This documentary follows the climate crisis and the emergence of solar geoengineering over more than a decade and across four continents, as leading scientist David Keith, fellow researchers, and rogue engineers attempt to launch the world’s first experiments into the stratosphere. 

 

There are no easy answers left, just a question:

In a planetary emergency, are any ideas too risky to explore?​