India could meet air quality standards by cutting household fuel use: Nearly half of the country’s population relies on dirty fuels such as wood, dung, coal and kerosene for cooking and heating

India could make a major dent in air pollution by curbing emissions from dirty household fuels such as wood, dung,

Ultrasonic attack is unlikely, but incidental exposure presents plenty of problems: While ultrasonic death rays are still a thing of fiction, there is growing evidence that exposure to ultrasonic waves may cause adverse health effects

New technologies for mobile devices may use ultrasonic sound waves for a variety of purposes, from charging your phone when