What risks or challenges exist, and how could they be overcome?

This is exactly where the challenge with decision making exists.

While challenges still exist, their immediate needs for shelter, energy, and food are taken care of.

While great strides have been made in improving blood safety, challenges still exist.

"However, significant budgetary challenges still exist, and now is not the time to change course."

But with so extensive a project, many challenges exist.

Critical environment construction includes projects where highly sensitive or technical challenges exists.

Although challenges still exist, adoption and foster care are increasingly being seen as viable alternatives for these children.

Again, the individual challenge exists in the cross-company character.

The problems were not primarily technical, although technical challenges certainly existed.