Last winter, smog levels in Beijing, China were found to be 10 to 15 times what the World Health Organization classifies as a health risk. The streets are still overflowing with people wearing gas masks and respirators,...
Last winter, smog levels in Beijing, China, were found to be 10 to 15 times what the World Health Organization classifies as a health risk. The streets are still overflowing with people wearing gas masks and respirators,...