Just in time for Earth Day, China has declared a war on pollution. Notorious for smog so dense it makes tourism challenging, the government is attempting to change that image. Hotels stock guest rooms with gas masks and historical landmarks appear to be in perpetual snowstorms. That snow is actually air pollution created by China's prolific manufacturing industry and total lack of environmental laws. They hope to change this dirty reputation by enacting new laws soon.
Edit- In addition to air pollution there has been an abundance of pig pollution.