In 1998, Huo quits his job and takes on his environmental career as a full-time mission. Armed with a cheap camera, pen and notebook, he visits more than 20 cities and towns along the river and laboriously takes over 20,000 pictures recording the severe pollution in the area. "I haven't been to the hospital for a long time. I dare not. I'm worried that I have already caught some disease," Huo explains. [Photo/Huaihe River Guardians]