As of April 1, 2019, the ECO became part of the Office of the Auditor General of Ontario. This change occurred under the Restoring Trust, Transparency and Accountability Act, 2018.

This website will no longer be updated. Please visit

2018 Greenhouse Gas Progress Report

Climate Action in Ontario: What's Next?

On September 25, 2018, the Environmental Commissioner of Ontario released her 2018 Greenhouse Gas Progress Report, Climate Action in Ontario: What’s Next?, to the Ontario Legislature.

The report calls on the provincial government to create a climate change law that drives down emissions while funding sensible solutions. A meaningful climate law needs science-based emissions budgets, a legal obligation to stay within those budgets, and credible, transparent progress reporting.

Read the full report or download individual sections of the report below:



NOTE: Page 23 has been updated to make two factual corrections.

The text referencing Figure 1.5 now states:

“As shown in Figure 1.5, there has been a sustained increase in the frequency of climate extremes and changes in sea level in Canada and the U.S. over recent decades.”

The caption for Figure 1.5 now states:

“The Actuaries Climate Index measures changes in extremes of high and low temperatures, high winds, heavy precipitation, and drought, as well as changes in sea level, expressed in units of standard deviations from the mean for the 30-year reference period of 1961-1990. These values indicate a sustained increase in the frequency of climate extremes and changes in sea levels in Canada and the U.S.”

Return to Top