Bioreactor (image) Bielefeld University Caption Carbon dioxide and light: It is easy to grow algae in a bioreactor like that here at Bielefeld University. They then offer an alternative to the controversial use of land plants in bioenergy production. Credit Bielefeld University Usage Restrictions The image may only be used with appropriate caption or credit. 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.