Graphic: Trees and Shrubs vs. Medicare Costs (image) University of Illinois at Urbana-Champaign Share Print E-Mail Caption The study found that increases in forest and shrub cover corresponded to decreases in health care spending. No such relationship was found with other types of vegetative land cover, however. Credit Graphic by Gopikrishna J. Pillai, Scientific Illustrator Usage Restrictions Graphic can be used only with stories about the research described in this release. Credit required: raphic by Gopikrishna J. Pillai, Scientific Illustrator 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.