# Tim Mohin leads global push for consistent emissions rules

> The new CEO of the Greenhouse Gas Protocol oversees the framework used by 97% of S&P 500 companies to measure and report emissions.
- Title: Tim Mohin leads global push for consistent emissions rules
- Summary: The new CEO of the Greenhouse Gas Protocol oversees the framework used by 97% of S&P 500 companies to measure and report emissions.
- Keywords: tim mohin, greenhouse gas protocol, emissions reporting, climate accountability, s&p 500, carbon accounting, TIME
- Source: TIME — https://time.com/collection/time100-climate/2026/tim-mohin
- Published: 2026-11-09T13:01:05.348+00:00
- Read time: 1 min
- Topics: tim mohin, greenhouse gas protocol, emissions reporting, climate accountability, s&p 500, carbon accounting
## New protocol chief takes the helm
Tim Mohin became the first CEO of the Greenhouse Gas Protocol in 2026, overseeing a framework used by approximately 97% of disclosing S&P 500 companies to measure and report corporate emissions.
## Harmonizing rules across markets
Mohin is responsible for bringing together diverse voices to harmonize greenhouse-gas accounting rules despite pushback from some companies and government officials, making emissions reporting more consistent across markets.
## Why measurement matters most
Mohin says the most important action a corporation can take is to establish a robust greenhouse gas inventory. You cannot manage what you do not measure, and high-quality emissions data guides decision making.

> You cannot manage what you do not measure.
## Key takeaway

Tim Mohin became the first CEO of the Greenhouse Gas Protocol in 2026, overseeing emissions accounting rules used by 97% of S&P 500 companies.