The Climate Change Performance Index covering performance reported in 2020 had recently been released when this article was written. The index assessed 57 countries plus the European Union, together accounting for roughly 90 percent of global greenhouse-gas emissions.
The original post focused particularly on Iran's results. It reported that Iran, Saudi Arabia, and the United States appeared among the lowest-performing countries in the overall assessment and described Iran's results across the index's major areas: greenhouse-gas emissions, renewable energy, energy use, and climate policy.
In the greenhouse-gas-emissions category, the source states that Iran was among the bottom four countries, with only Chinese Taipei, Saudi Arabia, and Kazakhstan performing lower in the comparison cited by the post.
For renewable energy, the article reports Iran at the bottom of the table, interpreting the result as indicating very limited progress in clean-energy development during the assessment period.
For energy use, Iran was described as being among the six lowest-performing countries. The post also comments on Canada's poor performance in that category while noting that Canada's climate-policy result was closer to the middle of the table.
In the overall ranking discussed by the source, Iran was among the bottom three, with Saudi Arabia and the United States below it. The author observed that Iran's score was sufficiently low that improvements in any of the index components could materially improve its placement in later editions.
This translation preserves the original article's account of the 2020/CCPI 2021 assessment. The CCPI is an external comparative index, so the rankings and performance characterizations above are those reported by that index and by the original post, not independent judgments added in this translation.