Nissan will be the victim of cost-cutting “carnage” if it combines forces with Japanese peer Honda, former Nissan CEO Carlos Ghosn told CNBC on Tuesday.

Japanese automakers Honda and Nissan will attempt to merge and create the world’s third-largest automaker by sales as the industry undergoes dramatic changes in its transition away from fossil fuels.

Japan’s second- and third-largest automakers hope the $50 billion deal would help them catch up with Tesla and China’s BYD in electric vehicles and advanced software.