March 31, 2015. A webcam is a small camera attached to a computer. They serve a variety of purposes, from taking still images to sending a live video over conference calls. Many laptops have a webcam built in to the computer screen, but external webcams are also sold. If you purchase an external webcam for use, you may also need to get a microphone if you plan on using the camera for either captured or live video.
Environmental Protection Agency: The US government agency founded to protect human health and to safeguard the natural environment--air, water, and land--upon which life depends.. The Environmental Protection Agency is known as the EPA.
Environmental Protection Agency. The core purpose of the Environmental Protection Agencyâs (EPAâs) Global Change Research Program is to develop scientific information that supports stakeholders, policy makers, and society at large as they respond to climate change and associated impacts on human health, ecosystems, and socioeconomic systems.