# How bad will CO2 atmospheric concentration get before 2030

> At least 440 leads at 79%, runner-up 22% across 4 winner-take-all outcomes — refreshed 4 min ago.

URL: https://simplefunctions.dev/odds/co2level
Updated: 2026-06-29T01:20:50.693Z
Category: general
Status: active
Closes: 2030-01-01

## Headline

- Leader: At least 440 at 79%
- Runner-up: At least 445 at 22%
- Outcomes: 4 (winner-take-all)
- Venue: Kalshi (4 contracts)
- 24h volume: $0

## Bound contracts (4)

| Outcome | Price | 24h | Volume | Venue | Slug |
|---|---|---|---|---|---|
| At least 440 | 79¢ | +1pp | $0 | kalshi | /markets/how-bad-will-co2-atmospheric-concentration-get-bef-kalshi-kxco2level-30-440 |
| At least 445 | 22¢ | −1pp | $0 | kalshi | /markets/how-bad-will-co2-atmospheric-concentration-get-bef-kalshi-kxco2level-30-445 |
| At least 450 | 13¢ | −1pp | $0 | kalshi | /markets/how-bad-will-co2-atmospheric-concentration-get-bef-kalshi-kxco2level-30-450 |
| At least 455 | 5¢ | +3pp | $0 | kalshi | /markets/how-bad-will-co2-atmospheric-concentration-get-bef-kalshi-kxco2level-30-455 |

## 30-day trajectory

| Day | At least 440 | At least 445 | At least 450 |
|---|---|---|---|
| 2026-05-30 | 69 | 28 | — |
| 2026-05-31 | 79 | 26 | 15 |
| 2026-06-08 | 81 | 24 | 12 |
| 2026-06-10 | 80 | 22 | 13 |
| 2026-06-15 | 80 | — | — |
| 2026-06-18 | 81 | 23 | 14 |
| 2026-06-21 | 81 | 22 | — |
| 2026-06-22 | 80 | — | — |
| 2026-06-23 | 80 | 23 | 13 |
| 2026-06-24 | 80 | 22 | — |
| 2026-06-27 | 82 | — | — |

_25 days of price history captured. Each row is the daily mean of intraday 5-min captures._

## Analysis

This probability reflects the market's assessment that atmospheric CO2 will reach at least 440 ppm before the end of 2029. Current CO2 levels stand near 425 ppm, meaning a rise of roughly 15 ppm in approximately 3.5 years would be required. The trajectory depends on two primary factors: global emission trends and natural carbon cycle dynamics. Recent years have seen CO2 rise approximately 2-2.5 ppm annually, though this rate fluctuates with economic activity and weather patterns. An 80% probability suggests markets expect continued emissions growth or stable/increasing atmospheric concentrations. The key uncertainty driver is whether global emissions will accelerate, stabilize, or begin declining—outcomes influenced by policy implementation, industrial activity, and renewable energy adoption. Actual atmospheric measurements, released monthly by organizations like NOAA, will determine whether this threshold is crossed before 2030.

### Key factors

- Global CO2 emission rates in 2026-2029 relative to historical 2-2.5 ppm annual growth trajectory
- NOAA and similar organizations' monthly atmospheric CO2 measurements showing whether 425 ppm → 440 ppm occurs by December 2029
- Economic growth and energy demand patterns, particularly in developing economies, affecting fossil fuel combustion rates
- Policy effectiveness in major emitter nations regarding emissions reduction versus baseline projections
- Natural climate variability (e.g., volcanic activity, ocean cycles) that could temporarily suppress or enhance measured atmospheric concentrations

## Methodology

Headline is the **leader's price**, not an arithmetic mean — averaging disjoint winner-take-all outcomes is meaningless. Per-outcome prices come from the venue's last-traded mid; cross-venue values are simple means across contracts on each venue.

## How to use this data

- HTML: https://simplefunctions.dev/odds/co2level
- JSON: https://simplefunctions.dev/api/public/odds?slug=co2level

## License

CC-BY-4.0. Attribute "SimpleFunctions" with a link to https://simplefunctions.dev. See https://simplefunctions.dev/legal for terms.