[1]A new research found that inner—city kids living in neighborhoods with more green spare gained about l3％ less weight over a two—year period than kids living in more concrete and fewer trees. Such findings tell a powerful story. The obesity(肥胖)problem began in the l980s，and many people attribute it to unbalanced diet and inactivity, but that can’t be everything.“Most experts agree that the changes are related to something in the environment，”says Thomas Glass of The Johns Hopkins Bloomberg School of Public Health． That something could be a decrease of the green.
