Standing inside a purpose-built laboratory at the University of Salford is a red-brick terraced house. At first glance, it looks just like the thousands of homes that line the streets beyond in the northern English city of Manchester.
But this is Energy House 1, located on Joule Terrace, and it has been designed by scientists researching what Britain’s dreams of an all-electric, net zero future might look like in reality.
The house, and its successor Energy House 2, have been used to test an array of technologies – from smart meters to thermal paints – combined with detailed modelling to understand their real world implications.
As countries race to wean their economies off fossil fuels and reduce their carbon emissions to net zero by mid-century, switching to electricity in homes and transportation looks like a relatively easy win.
Ageing gas boilers can be replaced with a heat pump to warm radiators and water tanks, for example. And millions of vehicles powered by petrol and diesel can be switched out for electric vehicles (EVs).
Yet the extent to which that shift contributes to a green energy transition will depend on the level of renewables and other clean energy sources adopted by each country.
‘Age of electricity’
Globally, power generation from solar panels and wind turbines increased at a record pace in 2024, an annual review by the International Energy Agency (IEA) shows. That was thanks to a rapid rate of new renewables installation, while nuclear power output was boosted by new projects and the restarting of reactors in France and Japan.
But electricity generation from fossil gas and coal kept growing and, overall, fossil fuels still represented 60% of the global electricity mix last year.
Soaring use of cooling technologies like air conditioning in response to extreme heat was a key factor in the growing appetite for electricity, especially in China and India, which are heavy users of coal power, the IEA said.
Growing electricity consumption by industry, the rollout of electric vehicles and the expansion of data centres also drove power demand, it added.
Rising gas and coal use fuelled a 0.8% increase in global carbon dioxide emissions generated by the energy sector in 2024, the IEA said – but trends varied widely across regions.
Fatih Birol, the IEA’s executive director, noted that “even though oil and gas will remain essential energy carriers, we hear the footsteps of the age of electricity coming”.
Governments need holistic vision
Despite this expectation of a fundamental shift in how economies are run, electrification as a goal in itself is often neglected in governments’ climate plans, according to Richard Black, director of policy and strategy at Ember, a UK-based energy think-tank.
“Electrification as a concept is something that’s only really talked about by energy analysts,” he said.
“Governments don’t think in these terms. They think about electric cars or heating, or green steel. They don’t necessarily have a holistic vision of why it makes sense to consider all these sectors together, and how you would plan your electricity system expansion alongside that,” he added.
April’s massive power outage across Spain and Portugal was a reminder of the challenges of growing dependence on electricity, as transport networks and businesses were severely disrupted. While the cause is still being investigated, there have been calls for investment in national grid infrastructure and storage to ensure increases in electricity capacity can be managed appropriately – a challenge that is not limited to the Iberian peninsula.
In the Global South, meanwhile, some 750 million people still live without access to electric power – mostly in sub-Saharan Africa, according to the IEA. That is putting the brakes on ambitious plans to boost EV adoption on the continent, especially in remote rural areas.
Electricity demand surges, expanding renewables and fossil fuels in 2024
Electric vehicles catch up
Despite such issues, vast strides have already been made on electrification globally, Black said, noting that researchers have dubbed China the world’s first major “electrostate”, having electrified by 10 percentage points per decade.
Crucially, the new clean industries leading the electrification charge will allow governments to meet their climate targets while offering the public the promise of economic growth and green jobs.
The boom in EVs over the last decade is a case in point.
EVs aren’t new. In the early 20th century, they were in widespread use in US cities, with up to 30,000 EVs in operation at their peak. This was followed by a short, sharp decline as cheaper and longer-range petrol cars came to dominate.
In 2010, EVs made up less than 1% of all car sales worldwide.
But by the end of 2024, global sales of EVs had reached 17 million units, an increase of 25% on the previous year, according to data firm Rho Motion. Separate figures put the total number of global car sales at 75 million during the year.
The shift to EVs has been supported by strong government incentives such as subsidies – in places such as Norway, these policies helped new EV sales reach 89% of all car sales last year.
Alongside tax exemptions, Norwegian EV drivers have in the past enjoyed perks such as access to bus lanes, free municipal parking and zero charges on toll roads.
Clear emissions targets and the threat of fines have played a role in pushing European manufacturers to go electric. Across the European Union, CO2 targets for new vehicles are coming into force in 2025, which, although recently watered down, still have the ultimate goal of reaching zero emissions by 2035.
“The EU’s green policies are beginning to bite,” William Todts, executive director at the climate advocacy group Transport & Environment, told Climate Home. “Thanks to the switch to EVs, we are starting to see a structural decline in transport emissions.”
“Now is not the time to roll back green measures. For the continent’s prosperity and security, now is t
Read More
