The prime minister has set out plans for a so-called "green industrial revolution", including a UK-wide ban on the sale of new cars wholly powered by petrol and diesel by 2030. The original target was 2040, and the new date is thought to be the second most demanding timeline in the world. Some hybrid vehicles will be exempt from the ban. Electric car owners will get continuing subsidies and £1.3bn will be invested in the car charging network.
The 10-point plan will include a big push on generating energy from renewable sources, specifically offshore wind and hydrogen, and give a much bigger role for nuclear. Much of the spending is concentrated on old industrial areas, including stimulus for new clean energy hubs in north-east England. Some policies will directly affect people in their homes too, with better insulation a top priority and a ban on gas heating in new houses from 2023.
Boris Johnson says the investment will create up to 250,000 jobs and environmental campaigners have hailed it as a historic turning point on climate action. Critics say the planned £4bn investment is just a fraction of what's needed - but the government argues that number is part of a broader £12bn package that's expected to be greatly boosted by private funding.
To help make sense of it all we've explained some of the key terms. Also, read our business editor's thoughts, and what the car industry makes of it all.

The government will be hoping for good headlines for its green efforts, but it also finds itself the focus of criticism this morning. The public spending watchdog - the National Audit Office - says ministers must "come clean" about deals done to secure supplies of personal protective equipment at the start of the coronavirus crisis. The NAO says normal standards of transparency were set aside in the awarding of £18bn worth of Covid-19 contracts, and firms recommended by MPs, peers and ministers' offices were given priority. More than £10bn of business was awarded without a competitive tender process and not enough was done to address potential conflicts of interest, the NAO said.
The report comes after it emerged a Spanish businessman who acted as a go-between to secure protective garments for NHS staff was paid $28m (£21m) in UK taxpayer cash. The government acknowledged it had procured services with "extreme urgency", but still had "robust processes in place".

Sir Keir Starmer is being urged to keep his predecessor Jeremy Corbyn out of the Parliamentary Labour Party, following criticism of Tuesday's decision to reinstate him as a party member. Mr Corbyn was suspended three weeks ago for suggesting his political opponents had dramatically overstated the scale of anti-Semitism, but was readmitted after he issued a statement saying he regretted any “pain” caused. Sir Keir is now under pressure from Jewish groups and some of his own MPs to take further action. Former MP Louise Ellman, who quit the party over anti-Semitism last year, said Mr Corbyn shouldn't be allowed to sit as a Labour MP in the Commons.
BBC political editor Laura Kuenssberg says no decision has yet been made, but Sir Keir has pledged to introduce an independent process for dealing with anti-Semitism complaints in the new year. Read more on the whole row.

Several papers lead on what Christmas might look like this year. According to the Sun, the aim is to bring the UK under a common rule that would allow households to mix indoors for a limited period of perhaps five days. The Daily Express leads with a similar story, but disagrees on the detail. It believes the period will be three days, and three separate households will be able to meet. The i says the government wants to offer "a window of celebration" after an "incredibly difficult year". Elsewhere, there's reaction to Boris Johnson's "green revolution" plans. The Times says the jobs angle will be pushed hard to try to "blunt opposition" to the extra costs it could bring for households and businesses. And indeed, writing in the Financial Times, the PM does just that - calling his agenda "one of the most innovative and ambitious programmes of job creation we have known". Finally, the Daily Telegraph believes the ongoing row over Jeremy Corbyn's future "threatens to undermine Sir Keir's pledge to clean up the party". The Guardian suggests, though, that Mr Corbyn's return could make it an easier path to unity with the left of the party.

Forgotten records from Singapore and Indonesia are being rediscovered on vinyl, as the countries' music scenes undergo a renaissance. Find out more. Elsewhere, parts of outback Australia are finally seeing some rain after a prolonged drought - one local photographer shares the "amazing" feeling of capturing the storms on camera. And finally, two mothers describe the painful process of ending embryo storage, and why they're finding it so hard to let go.

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