If you've ever taken a deep breath in Beijing, you'll understand why Tesla is so excited about "bioweapon defense mode."



Given China's well-documented problems with air quality, Tesla is hoping the cabin-filtering feature will be a major selling point as it expands sales of its electric cars there.

"One of the most interesting features for the Chinese market is the bioweapon defense mode," said Jon McNeill, head of global sales and service for Tesla, in an interview with Chinese broadcaster CCTV that was posted on Twitter Wednesday.

"It creates air that's 800 times cleaner than the outside air," he added.

CCTV tweet