By 2022, the planet's population had passed __________.

Question

BlackTom AI · Accepted Answer

The question asks about a milestone in the planet's population by the year 2022.
Option 1: 2 billion. This figure corresponds to a much earlier historical stage (roughly around the early 19th century for global population, and certainly not by 2022), so it is not correct for the stated timeframe.
Option 2: 4 billion. While the world approached 4 billion around the 1970s, this option does not reflect the population level reached by 2022, making it inaccurate for the question.
Option 3: 8 billion. This is the widely reported milestone for the global population by 2022, reflecting current demographic estimates from sources such as the UN and other global statistics agencies. It accurately matches the queried timeframe and value.
Option 4: 10 billion. Although some projections foresee reaching 10 billion later in the century, by 2022 the population had not yet reached that level, so this option is incorrect for the asked year.
In summary, options 1, 2, and 4 describe milestones that either occurred much earlier or are not aligned with the specific year 2022, whereas option 3 correctly identifies the 8 billion mark reached by 2022.

By 2022, the planet's population had passed __________.单项选择题

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