1.   Few people understand the complex issues of environmental science.

2.   He accepts that aid agencies are grappling with highly complex issues.

3.   He was able to grasp complex issues quickly.

4.   It is important however to clarify some of the points made in relation to this often complex issue.

5.   Managing creativity has always been a complex issue.

6.   Nevertheless, we will attempt here to outline the main principles as simply as possible, without discussing complex issues.

7.   Perhaps it is not reasonable to expect news reporters to sort fact from fiction when complex environmental issues are at stake.

8.   Peter seemed to have an instant understanding of the most complex issues.

9.   Peter was one of those rare souls who seemed to have an instant understanding of the most complex issues.

10.   Reyes Heroles is well-respected for his ability to quickly grasp complex issues.