PCS (Purchase Control System) is a Chrome extension developed by TGT project. It falls under the category of Browsers and is classified as an Add-ons & Tools subcategory.

The main purpose of PCS is to visualize the carbon dioxide emissions associated with online shopping purchases. It aims to address the issues of wasteful spending, unnecessary carbon dioxide emissions, and their impact on the environment.

By using PCS, users are able to determine whether a product is worth buying by assessing the amount of carbon dioxide emitted during its production and transportation. Additionally, the extension provides information on the number of trees required to offset these emissions, based on their carbon dioxide absorption capacity per year.

With PCS, users can make informed decisions and contribute to reducing wasteful shopping practices and minimizing their carbon footprint. It offers a practical solution to promote sustainable online shopping and create a greener tomorrow.