The World Futurist Society has its 10 predictions for the next 25 years trend forecast out.
Forecast #5: Children's "nature deficit disorder" will grow as a health threat. Children today are spending less time in direct contact with nature than did previous generations. The impacts are showing up not only in their lack of physical fitness, but also in the growing prevalence of hyperactivity and attention deficit. Studies show that immersing children in outdoor settings--away from television and video games--fosters more creative mental activity and concentration.
Here's the list.
The Green Skeptic has his Top Twelve Environmental Hot Topics here. Guess what #7 is?
7. Diminishing connection and access to nature among children ("Nature Deficit Disorder").