I returned to South Korea in 2016 for two years to reconnect with my root and culture. I was utterly shocked that the clear blue sky from my childhood was long gone due to the fine dust crisis blown  from China to Korea.  The hazardous environmental impact is expected when majority of supplies are sourced and made in a single country for whole planet.  New technology of protective materials are great, but what we really  need to focus is taking care of what we have before it becomes too late.