An international group of leading technological thinkers identified the biggest challenges for engineers in the 21st century. Their conclusions are now available in the report, Grand Challenges for Engineering. The National Academy of Engineering released the report, which identifies 14 areas awaiting engineering solutions, on February 15, 2008. Here's the full list of challenges from the academy's experts:

• Make solar energy economical
• Provide energy from fusion
• Develop carbon sequestration methods
• Manage the nitrogen cycle
• Provide access to clean water
• Restore and improve urban infrastructure
• Advance health informatics
• Engineer better medicines
• Reverse-engineer the brain
• Prevent nuclear terror
• Secure cyberspace
• Enhance virtual reality
• Advance personalized learning
• Engineer the tools of scientific discovery