Delhi Air Pollution: According to Spokesperson of the Chinese Embassy in India, Yu Jing, China focused on multiple parallel steps to bring pollution under control. One of the key measures was to close small and inefficient coal-powered boilers, which were significant contributors to urban smog. Delhi Air Pollution: According to Spokesperson of the Chinese Embassy in India, Yu Jing, China focused on multiple parallel steps to bring pollution under control. One of the key measures was to close small and inefficient coal-powered boilers, which were significant contributors to urban smog.