South Africa, the world’s 12th-biggest producer of greenhouse gases, has committed to improving its target for reducing its projected emissions of the pollutants by 17% in 2025.

The environment ministry said in a presentation on Tuesday that it will, after consultation, present a revised so-called Nationally Determined Contribution to the United Nations Framework Convention on Climate Change.

That will propose an upper limit of 510 tons of carbon dioxide equivalent by 2025, down from a earlier target of 614 tons. While, the upper limit for 2030 is now 440 tons, the minimum level was unchanged at 398 tons.

Key to South Africa’s success in meeting the targets and making progress beyond 2030 is reducing its reliance on coal, which is used to generate almost all of the country’s electricity. State power utility Eskom plans to gradually close some of its plants and have them replaced with renewable energy.

That will take investment and a target of quadrupling the amount of finance secured to do so to $8 billion a year by 2030 has been set. Some of that money may come from the sale of green bonds by municipalities, the ministry said.

While Eskom, by far South Africa’s biggest emitter of greenhouses gases, has set a target of have net zero emissions by 2050 the updated NDC does not set a target for that date.

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