Popface 99 (image) University of California - Davis Share Print E-Mail Caption Free Air CO2 Enrichment facilities, like this one in Italy, blast crops with air containing increased amounts of carbon dioxide to understand how plants will respond to future climate change. Credit Gail Taylor/UC Davis Usage Restrictions Provide credit. Share Print E-Mail 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.