The National Center for O*Net Development recently released their research on the current economy and its effects on occupations.
Check out their list of Green Increased Demand Occupations, jobs that will likely experience an increase in employer demand. Their Green Enhanced Skills Occupations lists the jobs that will likely require a change in skill sets. Finally, the Green New and Emerging (N&E) Occupations lists the emerging jobs that are/will experience a huge demand. All of this can be found here.