This poster incorporates one of the most common symbols used in environmental activism: the gas mask. This iconography dates back to January 1970, when LIFE magazine featured a mother and baby both wearing gas masks while out for a walk. On the first Earth Day three months later, an Associated Press photographer captured a student smelling a flower through a gas mask—the image was published in dozens of newspapers around the world, inextricably linking the object with environmental causes. While the concept of a person shaving while wearing a gas mask may seem humorous if somewhat extreme, air-quality levels in many cities, including Delhi and Shanghai, are now so hazardous that schools are frequently closed and particulate masks are distributed to residents.