Exclusive: Mining giant says technology is not yet advanced enough to run a fully electrified fleet but experts say it is hooked on federal fuel tax credits

• Revealed: the internal BHP memo that slammed the brakes on world’s biggest miner’s climate push

• Read more from the BHP files investigation here

• Get our breaking news email, free app or daily news podcast

BHP has continued to spend hundreds of millions of dollars buying diesel trucks in the Pilbara despite internal documents suggesting it would increase emissions and be “misaligned” with its decarbonisation goals.

The mining giant is Australia’s biggest consumer of diesel and trucks are its biggest single source of diesel emissions. Replacing the fleet with battery-electric trucks is considered a critical step in the multinational’s efforts to decarbonise.

Cllr Lucy Shaw says councils could take up many policies to help, including more support for rooftop solar installations

Your editorial is right that the government could be doing more to help with the cost of living (The Guardian view on Britain’s coming energy shock: mini-measures won’t suffice, 22 May). That extends to local government, too. Renewable energy projects, from the industrial scale right down to rooftops, can be scuppered locally even if there is national support. The wealthiest borough in the entire country, Kensington and Chelsea, has the nation’s lowest rooftop solar installation rate, at just 0.6% of households according to the MCS installer database. This is despite touting groundbreaking policies to make it easier to build solar in conservation areas.

There are so many local policies that would help. Coordinating solar installations by street could lead to material cost savings, as would simpler permitting rules, and installations on council-owned rooftops. When 80% of cars in the borough are parked on the street, cost-effective public charging is essential to ensure that drivers can make the switch, like offering discounted charging when grid power is cheapest. Partnering with housing associations, charities, and energy suppliers to help people access energy efficiency services and government capital grants, or negotiate payment plans for their bills could go a long way to making people feel more secure.

While Westminster’s attention is focused on Andy Burnham and Makerfield, another pivotal byelection is taking place in Scotland’s north-east

The coming byelection in Makerfield, from where Andy Burnham aspires to make rapid progress towards Downing Street, is perhaps the most consequential in British political history. But the decision by the Scottish National party’s former Westminster leader, Stephen Flynn, to relocate to Holyrood means that another pivotal contest is taking place more than 350 miles to the north. If Makerfield is a test case for Mr Burnham and Labour’s ability to see off Reform UK, Mr Flynn’s old constituency of Aberdeen South is on the frontline of the increasingly fraught politics of North Sea oil.

Labour, despite finishing second in the 2024 general election thanks largely to anti-Tory tactical voting, will not be expecting much this time round. The ramifications of Donald Trump’s reckless war in Iran have exposed Britain’s ongoing vulnerability to fossil-fuel-related energy shocks, highlighting the practical benefits of moving to a green economy. But the knock-on effects of the closure of the strait of Hormuz have also been a gift for the Scottish Conservatives and Reform, who are framing the byelection as a local referendum on reviving oil and gas production beyond Westminster-imposed limits.

Grattan Institute calls on Labor to set policies that will further reduce the use of gas in order to meet net zero targets

• Sign up for climate and environment editor Adam Morton’s free Clear Air newsletter here

After more than a half a century of growth, the use of gas in Australia has peaked in all sectors and entered a “structural decline”. But use will need to fall fast to meet climate targets, according to new research from an influential thinktank.

The Grattan Institute warned the government had failed to acknowledge the decline and instead needed policies to further reduce gas use and avoid the need for expensive carbon capture technologies to meet net zero targets.

Sign up to get climate and environment editor Adam Morton’s Clear Air column as a free newsletter

Labour leadership hopeful says NI reduction for firms could ‘incentivise’ hiring, particularly of younger people

Wes Streeting has backed calls for national insurance cuts for businesses, and for the government to drill for oil and gas in the North Sea.

The former health secretary and potential Labour leadership candidate told the Sunday Times there should be a “targeted reduction” of employers’ national insurance contribution as a way to “actively incentivise” hiring, particularly of young people.

Australia is pioneering a revolution in home renewables and battery use, proving what is possible with the right policies

The timing was rich with symbolism. As intense heatwaves pummelled Europe and Asia, and oil markets around the world leapt and sputtered, the two big chimneys of one of Australia’s largest power stations were being demolished. Meanwhile, the Australian energy minister was holding a media conference to hail a fall of up to 10% in the benchmark electricity price in parts of the country.

Quietly, and with surprisingly little fanfare from the rest of the world, Australia is pioneering a revolution in home renewables and battery use, proving what is possible with the right policies. The country was already one of the global leaders in domestic solar power, with panels on one in three homes. It also remains, however, a major contributor to the climate crisis through its vast fossil fuel exports. But it is batteries that are giving Australia a new burst of speed.

Guardian investigation shows how US presidency blurs line between policy and enrichment of American ruling family and those around it

On a graffitied Sarajevo backstreet, a path leads past an overgrown patch of garden to a white door. Beyond is the registered office of a company that is on the brink of winning contracts worth more than $1bn.

AAFS Infrastructure and Energy is close to securing a concession to build and operate a pipeline across the Balkans to allow fossil gas shipped from the US to replace supplies that come from Russia. “This could be the most important infrastructure project ever in Bosnia and Herzegovina,” says one of the country’s top officials, who, like others, asks to remain anonymous to discuss sensitive negotiations.

More than 400,000 batteries have been installed under the cheaper home batteries scheme. Here’s how to get the best bang for your buck

• Change by degrees offers life hacks and sustainable living tips each Saturday to help reduce your household’s carbon footprint

• Got a question or tip for reducing household emissions? Email us at changebydegrees@theguardian.com

If Australians love solar, they are head over heels for home batteries. More than 400,000 batteries have been installed under the government’s subsidy scheme.

Here’s what you need to consider if you’re looking at getting one installed.

Clean power remains essential. But until it arrives, Britain must stop LNG made scarce by the Iran war setting gas and electricity prices

The US-Israel war on Iran will drive household energy costs in Britain to their highest level in two years over the summer. This has given fresh impetus to calls for the energy secretary, Ed Miliband, to change course. The cabinet minister is vulnerable because he promised cheaper bills if Britain embraced his clean, green power plan.

Critics, including Labour’s former prime minister Sir Tony Blair, are circling. Yet Mr Miliband ought to ignore the naysayers. Until global carbon emissions, including Britain’s, are reduced to net zero, the planet will continue to fry and temperature records will continue to be broken.

Do you have an opinion on the issues raised in this article? If you would like to submit a response of up to 300 words by email to be considered for publication in our letters section, please click here.

As summers become hotter, air conditioner sales are booming. If you’re looking to invest, here’s what to consider

When a heatwave struck the UK this week, Jon Connorton, a software developer, began monitoring temperatures inside his east Hampshire terrace house. With some rooms reaching close to 40C, it was time to deploy the air conditioner. “We just wheel it out in emergencies,” he said. “We were having trouble sleeping.”

Connorton and his wife have a portable air conditioner. These plug-in devices cool interior air by removing heat from it and blowing that heat outside, typically via a large hose slung from a window or door.

Datacentres used 22% of country’s electricity last year, pushing up household bills, study suggests

Energy demand by datacentres in Ireland has added hundreds of euros to household electricity bills in a pattern that could be replicated across Europe, according to a report.

Ireland’s growing number of datacentres last year used 22% of the country’s electricity, more than all urban homes combined, according to the Central Statistics Office. The equivalent figure in the US and UK is 6%.

Energy specialists say abandoning net zero and increasing oil and gas drilling would cause more instability for Britons

• UK politics live – latest updates

Abandoning net zero and drilling for more oil and gas in the North Sea would be a massive setback for the UK and would not help the economy, leading experts have said in response to claims by the former prime minister Tony Blair.

“This is a bizarre intervention to make during the worst May heatwave on record and when the Iran crisis is providing yet more evidence of the enormous costs of oil and gas,” said Ed Matthew, the UK programme director at the E3G thinktank. “Clean energy is cheaper energy – it protects our bills from prices skyrocketing, its running costs are virtually zero, and it doesn’t cause climate change which threatens economic collapse ... The government should ignore Blair’s ideological nonsense and focus on what works.”

With early tests suggesting the presence of crude oil, the Caribbean island has begun to debate whether it could justify becoming a producer

Jamaica is closer than ever to drilling for oil. Tests on samples from the seabed off the Caribbean island’s south coast earlier this year identified hydrocarbons, which suggest the presence of crude oil below ground.

Jamaica imports all its fuel, which costs about $1.5-2bn (£1.1bn-1.5bn) annually, depending on global oil prices. It is a persistent drag on an economy that generated $4.3bn from tourism, its biggest earner, in 2024.

More Americans are using small solar panels in their back yards or balconies as a clean way to cut their electric bills

If you feel like your electricity bill just keeps climbing, you aren’t imagining it. Since 2020, US residential energy prices have surged by about 30%, making power the largest household energy expense behind gasoline, according to the US Energy Information Administration.

But for residents like Alex Curtis, the days of feeling powerless against rising costs are coming to an end. Curtis is waging a war on his electric bill, and his new weapon of choice is a lightweight, thin-film solar panel.

Property owners’ lack of motivation due to ‘split incentive’ is main reason rental properties are missing out on energy upgrades, research finds

• Follow our Australia news live blog for latest updates

• Get our breaking news email, free app or daily news podcast

Renters make up nearly a third of Australian households yet many are missing out on energy upgrades – such as insulation, appliances and rooftop solar – that could slash their power bills and improve home comfort.

The problem, according to the Institute for Energy Economics and Financial Analysis (IEEFA), is landlords’ lack of motivation.

Regulator could do us all a favour with clear multi-year forecasts and breakdowns of electricity pricing

It is easy to predict where the energy regulator will set the next quarterly price cap on Wednesday. It’s just a matter of tracking wholesale prices in Ofgem’s relevant backward-looking “observation period”. Energy consultant Cornwall Insight thinks the typical household bill be £1,850, an increase of £209 from the previous quarter. It will be surprising if it is out by more than a few quid.

One can also make a fair guess at the regulator’s messaging. It will talk about the unavoidable impact from the surge in energy prices that followed the closure of the strait of Hormuz. It may also say the increase would be even greater than 13% without the additional wind and solar generation on the system these days. Fair enough. Gas sets the wholesale price of electricity only 60% of the time now, down from 90% not long ago.

Outrage as leaked documents reveal mining giant’s backsliding on commitments to slash emissions

• Adam Morton: Big Mining gets a $4bn tax break to use fossil fuel. It’s a strange way to tackle emissions

• Read more from the BHP files investigation here

• Get our breaking news email, free app or daily news podcast

The independent senator David Pocock says leaked BHP documents show that the mining giant is “laughing” at Australia’s key climate policy while pocketing hundreds of millions of dollars through a generous diesel tax break.

An exclusive investigation based on documents leaked to by the Guardian and the ABC show BHP has scrapped a project to significantly reduce global emissions, delayed vast renewables projects in the Pilbara and war-gamed options to push the electrification of its polluting diesel truck and train fleets into the next two decades.

Government should fit solar panels to power air con units where vulnerable people live, say green advocates

As the country baked in record May temperatures, climate campaigners have said the UK government needs to urgently start installing air conditioning units in schools, care homes and places where vulnerable people live.

In 2022, when temperatures spiked above 40C (104F), about 3,000 people in Britain died of causes associated with heat. Studies show air conditioning can cut heat related deaths by 75%.

Jay Morris denies experts’ claims that he violated ethics rules over land deals near the site of Meta’s Hyperion datacenter

This story is from Floodlight, a non-profit newsroom that investigates the powers stalling climate action

For more than two years, John “Jay” Morris, a Louisiana state senator, helped pave the way for Meta to build one of the world’s largest datacenters, called Hyperion, in Richland Parish.

Exclusive: Cache of internal documents leaked to the Guardian and the ABC’s Four Corners show multinational has war-gamed ways to massively delay decarbonisation

• Revealed: the internal BHP memo that slammed the brakes on world’s biggest miner’s climate push

• Read more from the BHP files investigation here

• Get our breaking news email, free app or daily news podcast

The world’s biggest miner has halted or delayed projects to cut vast amounts of emissions and has quietly war-gamed options to push major climate investments in its Western Australian iron ore operations into the next two decades, internal documents show.

An exclusive investigation based on documents leaked to the Guardian and the ABC’s Four Corners can reveal that BHP, one of Australia’s biggest historic emitters, has dumped plans for a facility that could have significantly reduced emissions and has put on ice renewable projects designed to power its iron ore operations in the vast, resource-rich Pilbara region.