PTI, SEOUL: Prime Minister Narendra Modi on Thursday said terrorism and climate change are two biggest challenges mankind is facing now and Mahatma Gandhi's teachings and values can help the world to address both the pressing issues.

Prime Minister Modi, who arrived here on a two-day visit to strengthen India's strategic ties with South Korea, along with South Korean President Moon Jae-in and former UN Secretary-General Ban Ki-moon unveiled a bust of Mahatma Gandhi at the prestigious Yonsei University here.

"It is a matter of great honour and my good fortune to unveil the bust of Mahatma Gandhi in Korea's premier university today," Modi said.

"This occasion assumes greater significance since we are celebrating the 150th anniversary of Gandhi and for the world he is the foremost messiah," he said.

Speaking on the occasion, the prime minister said today humanity across the world is facing two serious problems first terrorism and second is climate change.