The question will resolve to the ratio of total global human CO2 emissions in 2030 divided by emissions in 2023, divided by 2 (limited to the range 0-1).

So if you think emissions will double or more, bet it up to 1, if they will half, bet it down to 0.25. Resolution will preferentially use data from the global carbon project, or some successor organisation if this ceases to report values. You can find recent data here - note we want both fossil and land use emissions combined. https://ourworldindata.org/grapher/co2-fossil-plus-land-use