Given the information provided about hottest chili pepper, which is the hottest naturally grown chili pepper in the world?

Context: Especially among growers in the US, the UK, and Australia, there has been a competition since the 1990s to grow the hottest chili pepper. Chili pepper species and cultivars registering over 1,000,000 Scoville Heat units are called "super-hots". Past Guinness World Record holders include the ghost pepper, Infinity chili, Trinidad Moruga scorpion, Naga Viper pepper, and Trinidad Scorpion Butch T. The current record holder, declared in 2017, is the Carolina Reaper, at more than 1.6 million SHU.

Answer: The hottest naturally grown chili pepper, declared in 2017, is the Carolina Reaper, at more than 1.6 million SHU.