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This year’s of extreme weather shows us how little time we actually have to slash emissions.

It is now clear that going slow on cutting greenhouse gas emissions is than taking action. At this week’s climate ambition summit, United Nations secretary general António Guterres the world is “decades behind” in the transition to clean energy.

The UN’s new makes clear we need to accelerate the race to net zero.

It’s time to act as quickly as humanly possible. This week, Australia’s leading engineers and technology experts for Australia to get to net zero 15 years quicker than our current goal of 2050 to be more consistent with a 1.5℃ trajectory.

It will be hard. But ask yourself – what is the alternative?

To shake us out of business as usual, we have to fast-track regulatory change, upskill the workforce, future-proof national infrastructure, embed a zero-waste approach to supply chains and massively boost business investment. Here’s how.

The net zero grid

Per capita, Australia is the in solar and wind generation. But we’ll need more as we electrify the entire economy, which will .

To get there means investing in distribution, transmission, battery and pumped hydro storage and grid integration. All of this has to be fast-tracked through close engagement with communities and streamlined regulations.

Electrifying our export industries for both Australia’s and the world’s net zero efforts. This would make full use of our advantages in cheap power from renewables such as by making green hydrogen, which can help with green chemical and green metals manufacturing.

Pulling carbon dioxide back out of the air is another potential “export” industry. will be needed to bring levels in the atmosphere back down, and Australia could use cheap renewable energy to do it, and sell the credits to offset hard-to-abate areas such as plane flights.

Embrace the circular economy

Supply chains of products and raw materials put out emissions at every step along the way. Some emissions are from activities in Australia, others overseas. But all end up in the atmosphere.

Fixing this means slashing waste and removing emissions at every stage of production, from raw materials to recycling. Our food systems produce but around 30-40% of food is wasted.

But it’s more than that. The end goal must be , where overconsumption is phased out and waste becomes the feedstock for new products. We can greatly accelerate our efforts by working with European authorities, given they are .

Make our buildings run cleaner

Emissions from our buildings come largely from electricity and gas use, with embodied emissions from, say, the use of concrete in construction a smaller concern. Here, the low-hanging fruit is moving to zero-emissions electricity and .

Banning to the gas network as Victoria and the ACT are doing, is another opportunity.

When gas heaters reach their end of life, we can require they be replaced by electric heaters. This won’t significantly increase the grid demand if high efficiency heat pumps are used.

And we should boost efficiency standards still further for new buildings and major renovations. Australia’s new will help, but more can be done.

In the longer term, cement made without emissions and new construction methods will help further cut emissions.

Electrify transport

After a slow start, electric cars are finally gaining popularity in Australia. Now we’re seeing electric utes and trucks. Electric buses are already on the roads in some states. This is essential. Now it’s time to speed it up.

We need all states and territories on board to plan for a phase-out of internal combustion engines, coupled with better investment in public and private charging infrastructure.

Electrifying transport will give us enormous battery packs in our driveways – often several times the capacity of a home battery. New technologies such as will let us use our cars as grid backup and give households security if there’s a blackout.

Shipping giants are working on the challenge of cleaning up emissions, while work is being done on electric planes. These are harder nuts to crack, but already there are up and running in Europe and short-trip on sale in Australia.

Farming and mining

Some farms are on solar and storage for cost and energy security reasons. But there’s more to do, such as slashing emissions of the potent greenuouse gas nitrous oxide from fertilisers using .

In mining, some operators are rapidly cleaning up their operations – and often for cost reasons. Running a mine site on diesel is expensive. We need to accelerate the shift here towards powering grinding machines, excavators and ore trains with renewables.

Some problems don’t yet have off-the-shelf solutions, such as reducing methane from livestock or producing steel cost-effectively without using coal.

These hard-to-cut sources of emissions will need significant and sustained investment to produce practical and cost-effective technologies solving the problems.

Technology – and talking

Swapping fossil fuels for clean technologies will take talking as well as technology. Many of us find change confronting, especially at this pace.

So we need to do this right, sharing economic benefits and preserving the social fabric of communities and avoiding damaging nature. The debate over new transmission lines is a case in point.

We’ll need an – and one that isn’t limited to expert, government and industry circles.

We have new institutions to help us move faster, such as the Net Zero Authority, the new mandates for the Climate Change Authority, and the sector-level net zero plans in progress.

Now we need to get on and do it. Yes, it’s faster than we thought possible. But fast is now necessary.

Mark Howden is a board member of CO2 Value Australia..

Frank Jotzo leads research projects funded by a range of organisations. None of these create a conflict of interest regarding this article.

Ken Baldwin has received funding from the Australian Research Council, and the DFAT Partnerships for Infrastructure program

Kylie Catchpole receives funding from ARENA and industry partners related to solar technology development.

Lachlan Blackhall has received, or is currently receiving, project funding from ARENA, the federal government, several state governments, and multiple industry partners for work related to energy storage and grid integration. He is a Director of Engineers Australia and the independent chair (unpaid) of the DEIP Interoperability Steering Committee (ISC). He was previously the co-founder and CTO of Reposit Power, but is no longer a shareholder, director, or employee of Reposit Power and receives no remuneration from Reposit Power.

Kylie Walker does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.