Conditional on at least 8 degrees of global warming by 2100, will at least 1 billion people remain alive?
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The condition is met if we ever cross the threshold, even if global temperatures are later brought below it. The resolution criterion is met if world population ever dips below 1 billion for any length of time before 2100.
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What is this?
What is Manifold?
Manifold is the world's largest social prediction market.
Get accurate real-time odds on politics, tech, sports, and more.
Win cash prizes for your predictions on our sweepstakes markets! Always free to play. No purchase necessary.
Are our predictions accurate?
Yes! Manifold is very well calibrated, with forecasts on average within 4 percentage points of the true probability. Our probabilities are created by users buying and selling shares of a market.
In the 2022 US midterm elections, we outperformed all other prediction market platforms and were in line with FiveThirtyEight’s performance. Many people who don't like trading still use Manifold to get reliable news.
How do I win cash prizes?
Manifold offers two market types: play money and sweepstakes.
All questions include a play money market which uses mana and can't be cashed out.
and can't be cashed out.Selected markets will have a sweepstakes toggle. These require sweepcash to participate and winners can withdraw sweepcash as a cash prize. You can filter for sweepstakes markets on the browse page.
to participate and winners can withdraw sweepcash as a cash prize. You can filter for sweepstakes markets on the browse page.Redeem your sweepcash won from markets at 1.00 → $1.00, minus a 5% fee.
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