Question 2a: How many humans will be alive in the year 2100? (go to question 3 next)

More than 1 trillion

More than 100 billion, but no more than 1 trillion

More than 50 billion, but no more than 100 billion

More than 20 billion, but no more than 50 billion

More than 10 billion, but no more than 20 billion

More than now, but no more than 10 billion

More than 5 billion, but no more than now

More than 1 billion, but no more than 5 billion

More than 100 million, but no more than 1 billion

More than 10 million, but no more than 100 million

More than 1 million, but no more than 10 million

More than 100,000, but no more than 1 million

More than 10,000, but no more than 100,000

More than 1,000, but no more than 10,000

More than 100, but no more than 1,000

More than 10, but no more than 100

More than 1, but no more than 10

Only 1