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Science breaks new ground in converting coal ash from pollutant to useful products

13 Jul 2015

What fly ash looks like after being stored in an ash dam.
What fly ash looks like after being stored in an ash dam.

By LESLIE PETRIK.- South Africa has large coal reserves. It mainly burns coal to produce electricity at 13 existing coal-burning power plants, situated mainly in Mpumalanga, a province in the country’s east.

Coal power generation results in at least 36 million tonnes of solid waste residue called fly ash being produced annually. That’s the equivalent of six dumps each the size of the Pyramid of Giza.


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'Get on with it': Greens push for pre-election solar law

Thu 9 Jul 2026

By Shannon Morris-Williams | The Green Party is calling on Parliament to pass legislation enabling low-cost household solar finance before the election, arguing there is now cross-party support following Labour's SolarSaver announcement and National's earlier Home Energy Fund pledge.

Govt backs hydrogen with national industry summit

Thu 9 Jul 2026

By Oli Lewis | The Government is convening a major hydrogen conference to promote awareness and uptake of the alternative fuel.

Pūkaki consent puts dry-year rules in spotlight

Wed 8 Jul 2026

Meridian Energy’s approval to draw Lake Pūkaki below its normal operating range has exposed a gap in New Zealand’s electricity security arrangements.

Faster consenting, harder trade-offs

Tue 7 Jul 2026

Faster consenting is starting to produce results, but this week's decisions show speed has not removed the harder trade-offs around electricity security, conservation, ecology and climate liability.

Contact: Protected geothermal fields must be opened to meet 2040 goal

6 Jul 2026

By Oli Lewis | A goal to double geothermal energy generation by 2040 using existing technologies is unachievable unless some protected fields are reclassified for development, Contact Energy says.

Fast-track panel backs proposed Haldon Solar Farm

6 Jul 2026

By Shannon Morris-Williams | The proposed Haldon Solar Farm in the Mackenzie Basin has moved to the final stages of the Fast-track Approvals Act process after the Fast-track Panel proposed granting approval for the project.

Taranaki offshore wind developer eyes mid-2030s commissioning after law change

3 Jul 2026

By Oli Lewis | The first offshore wind farm in New Zealand could be commissioned by the mid-2030s, with its developer saying a new permitting framework has bolstered investor confidence.

EECA seeks answers on NZ's future fuel mix

3 Jul 2026

By Shannon Morris-Williams | The Energy Efficiency and Conservation Authority is looking for specialists to assess the role future low-emissions fuels could play in New Zealand’s energy system.

Ed Harvey

Australia is at least ten years ahead of us on solar. It’s time we caught up.

3 Jul 2026

By Ed Harvey | OPINION: Starting this week, millions of households across New South Wales, South Australia and Southeast Queensland will have access to three hours of free electricity every single day.

Offshore renewable energy bill passes, opening path for developers

2 Jul 2026

By Oli Lewis | Feasibility permits for offshore wind developments could be issued within months after the Government passed a long-awaited law to establish a regulatory regime.

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