'Dr. Doom' Nouriel Roubini says China and the US need to dial back tensions or risk a conflict that would destroy the world economy

• The US and China are on a collision course that threatens the world economy, Nouriel Roubini warned.
• The "Dr. Doom" economist pointed to growing tensions between the US and China.
• "If they fail to achieve a new understanding on the issues driving their current confrontation, they will eventually collide."

US-China tensions are headed down a dangerous path, and a collision between the two countries would destroy the world economy, according to top economist Nouriel Roubini.

The "Dr. Doom" economist, who is notorious for his bombastic prognostications on Wall Street, warned that both nations are in a cold war that could turn hot.