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Botswana Says Huge 2,492-carat Diamond Uncovered at Mine

FILE PHOTO: Diamonds are displayed during a visit to the De Beers Global Sightholder Sales (GSS) in the capital Gaborone in Botswana, November 24, 2015. REUTERS/Siphiwe Sibeko/File Photo
FILE PHOTO: Diamonds are displayed during a visit to the De Beers Global Sightholder Sales (GSS) in the capital Gaborone in Botswana, November 24, 2015. REUTERS/Siphiwe Sibeko/File Photo
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Botswana Says Huge 2,492-carat Diamond Uncovered at Mine

FILE PHOTO: Diamonds are displayed during a visit to the De Beers Global Sightholder Sales (GSS) in the capital Gaborone in Botswana, November 24, 2015. REUTERS/Siphiwe Sibeko/File Photo
FILE PHOTO: Diamonds are displayed during a visit to the De Beers Global Sightholder Sales (GSS) in the capital Gaborone in Botswana, November 24, 2015. REUTERS/Siphiwe Sibeko/File Photo

Botswana says one of the largest diamonds ever found has been unearthed at one of its mines and will be put on show on Thursday.
The Botswana government believes the huge 2,492-carat stone is the biggest discovered in the country, and the second-biggest ever brought out of a mine.
Canadian mining company Lucara Diamond Corp. said in a statement Wednesday that it recovered the “exceptional” rough diamond from its Karowe Mine in western Botswana. Lucara said it was a "high-quality" stone and was found intact. It was located using X-ray technology.
The weight would make it the largest diamond found in more than 100 years and the second-largest ever dug out of a mine after the Cullinan Diamond discovered in South Africa in 1905, The Associated Press reported. The Cullinan was 3,106 carats and was cut into gems, some of which form part of the British Crown Jewels.
A bigger black diamond was discovered in Brazil in the late 1800s, but it was found on the surface and was believed to have been part of a meteorite.
Botswana is the second biggest producer of diamonds and has unearthed all of the world's biggest stones in recent years.
Before this discovery, the Sewelo diamond, which was found at the Karowe Mine in 2019, was recognized as the second-biggest mined diamond in the world at 1,758 carats. It was bought by French fashion house Louis Vuitton for an undisclosed amount.
The 1,111-carat Lesedi La Rona diamond, also from Botswana's Karowe Mine, was bought by a British jeweler for $53 million in 2017.

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‘More and Faster’: UN Calls to Shrink Buildings’ Carbon Footprint

Snow capped mountains are seen behind the downtown Los Angeles skyline, California, US, March 7, 2025. (Reuters)
Snow capped mountains are seen behind the downtown Los Angeles skyline, California, US, March 7, 2025. (Reuters)
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‘More and Faster’: UN Calls to Shrink Buildings’ Carbon Footprint

Snow capped mountains are seen behind the downtown Los Angeles skyline, California, US, March 7, 2025. (Reuters)
Snow capped mountains are seen behind the downtown Los Angeles skyline, California, US, March 7, 2025. (Reuters)

Countries must move rapidly to slash CO2 emissions from homes, offices, shops and other buildings -- a sector that accounts for a third of global greenhouse gas pollution, the United Nations said Monday.

Carbon dioxide emissions from the building sector rose around five percent in the last decade when they should have fallen 28 percent, according to a new report by the United Nations Environment Program (UNEP).

It said emissions had plateaued since 2023 as climate policies began to have an impact, particularly green building standards, the use of renewable energy and electrified heating and cooling.

But the building sector still consumes 32 percent of the world's energy and contributes 34 percent of CO2 emissions, the report found.

"The buildings where we work, shop and live account for a third of global emissions and a third of global waste," said Inger Andersen, Executive Director of UNEP.

"The good news is that government actions are working. But we must do more and do it faster."

She called on nations to include targets to "rapidly cut emissions from buildings and construction" in their climate plans.

The report said that while most of the countries that signed up to the 2015 Paris climate deal -- nearly 200 have signed -- mention the sector, so far only 19 countries have sufficiently detailed goals in their national carbon cutting plans.

The report said that as of 2023, important metrics like energy-related emissions and the adoption of renewable energy "remain well below required progress rates".

That means that countries, businesses and homeowners now need to dramatically pick up the pace to meet the 2030 emissions reduction targets.

- 'Critical challenge' -

Direct and indirect CO2 emissions will now need to fall more than 10 percent per year, more than double the originally envisaged pace.

The rollout of renewables is a similar story.

The share of renewables like solar and wind in final energy consumption rose by only 4.5 percentage points since 2015, well behind the goal of nearly 18 percentage points.

That now needs to accelerate by a factor of seven to meet this decade's goal of tripling renewable energy use worldwide, UNEP said.

The report urged countries to accelerate the roll-out of renewable technologies and increase the share of renewables in the final energy mix to 46 percent by 2030 -- a rise of around 18 percent.

It also called on policymakers to increase energy efficiency retrofits to include better design, insulation and the use of renewables and heat pumps.

More work also needs to be done to improve the sustainability of materials like steel and cement, whose manufacture accounts for nearly a fifth of all emissions from the building sector.

But the report did say that circular construction practices were increasing in some areas, with recycled materials accounting for 18 percent of construction inputs in Europe.

The authors urged all major greenhouse gas emitters to take action by introducing zero-carbon building energy codes by 2028, and called on other countries to create and tighten their regulations within the next 10 years.

The report highlighted positive national policies from China, France, Germany, Mexico and South Africa among others.

But it said financing remained a "critical challenge".

In 2023, it found that global investment in energy efficiency in buildings fell seven percent from a year earlier to $270 billion, driven by higher borrowing costs and the winding back of government support programs, notably in Europe.

Those investments now need to double -- to $522 billion -- by 2030, it said.