Environmental footprints by the app (IMAGE) Purdue University Caption A new study estimates the approximate carbon, water and land footprints associated with each hour of data spent in popular internet apps. Credit Purdue University/Kayla Wiles Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.