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