With about 1.57 billion followers or 23% of earth's population, Islam is the second-largest religion and one of the fastest-growing religions in the world.

Islam is the second-largest religion in France now.

Christianity in Indonesia is the country's second-largest religion, after Islam.

Islam arrived in the Philippines two centuries before Christianity and today is the second-largest religion in the islands.

Sikkim's second-largest religion is Buddhism, which accounts for 28.1 per cent of the population.

Hinduism is the second-largest religion.

The second-largest religion in the country is Christianity, which had been present before the arrival of Islam.

There are also large Christian communities in other parts of the world, such as Central Asia, where Christianity is the second-largest religion after Islam.

As of October 2009, there were 1.571 billion Muslims, making Islam the second-largest religion in the world.

"If it's not the case now," he said, "then within a matter of decades Islam will be the second-largest religion in America."