A massive asteroid is expected to smash into Earth this month, potentially leading to human extinction, unless leaders take action according to a top scientist.

Greg Leonard, a senior researcher at the NASA financed Catalina Sky Survey (CSS), puts the probability at "100%," unless changes are made, Express.co.uk reported.

However, Leonard did also admit that the chances of being killed by an asteroid are currently lower than dying after an asteroid strike.

Asteroid 2000 QW7 is between 951 ft and 2.132 ft in diameter, nearly as tall as the Burj Khalifa, the world's tallest building, msn reported.

The asteroid will fly by on September 14, according to NASA's Centre for Near Earth Object Studies.

It will be at a speed of 14,361 mph and is currently about 3.3 million miles from Earth.

The last time 2000 QW7 passed Earth was in 2000 and NASA expects it will pass by us in October 2028.