The increased UK target, which slashes greenhouse gas emissions compared to 1990 levels, is in line with the recommendation of the Climate Change Committee.
But the Prime Minister has said he will not be “telling people how to live their lives” as part of plans to reach the target.
He told a press conference in Baku: “We set out the target, which is an important, ambitious target, what we are not going to do is start telling people how to live their lives.
I am interested in making sure that their energy bills are stable, that we've got energy independence, and that we also, along the way, pick up the next generation of jobs
"We are not going to start dictating to people what they do. But we are going to be clear that that involves hitting the clean power 2030 mission that we have set out, one of the five big projects of the Government.
"That is vital, so we will hit that, it is an ambitious target, it is a realisable target, but it is not going to be one in which we tell people how to live their lives."
He said a key way of hitting the target would be “making sure that we get to clean power by 2030 – that’s the single most important target on the way to the emissions.
“And that will bring with it lower bills for people, for their energy it’ll give them independence, so that tyrants like (Vladimir) Putin can’t put his boot on our throat, causing all sorts of difficulties for our energy bills,” the Prime Minister told broadcasters in Baku.
He said the target was “difficult” but “achievable”, adding: “But it’s not about telling people how to live their lives. I’m not interested in that. I am interested in making sure that their energy bills are stable, that we’ve got energy independence, and that we also, along the way, pick up the next generation of jobs.”
A £1 billion order for blades for offshore wind turbines to be made in Hull has been secured, he said.
The Prime Minister also plans to push the private sector to “start paying their fair share” when it comes to climate commitments.
But he said he would not be banning people from using private jets
Asked if he was disappointed other world leaders had not attended Cop29, Sir Keir said the UK was at the summit to “show leadership”.
The climate conference in Azerbaijan comes days after the re-election of Donald Trump, who is expected to boost fossil fuels, roll back green incentives domestically and pull his country out of the Paris climate agreement again.
Sir Keir said he would not comment on Trump when asked if he was prepared to call out the president-elect about his claims that climate change is a hoax, saying: “I’m not going to comment on his views. I am very clear in mine.”
Secretary of State for Energy Security and Net Zero Ed Miliband, who has also have also travelled to Azerbaijan, claimed on Tuesday Trump can’t “stop” the battle to save the planet.
The Prime Minister has said he sees action on climate change as not just an obligation, but an opportunity.
“The UK has a huge opportunity to get ahead here when it comes to renewables,” he said.
“That’s why I’m encouraging as much investment as I can when it comes to carbon capture, when it comes to hydrogen, when it comes to offshore wind.
“There’s a global race on now to be the global leader on this. I want us to be in the race and I want us to win the race.”
Wealthier countries are facing pressure over delivering finance to help poor countries cope with climate change, and increasing their ambitions on emissions cuts.
One hundred billion dollars (£77 billion) a year was pledged in private and public finance to help poorer nations, as part of efforts to secure the Paris treaty negotiated in 2015.
But wealthier nations must now iron out a new finance agreement that meets the Paris commitments for sufficient cash flows for cutting emissions and adapting to climate change, with experts saying one trillion US dollars needs to be flowing into developing countries each year by 2030.
In 2019, the Tories pledged £11.6 billion to help poorer countries deal with climate change over five years to 2025/26.
The Labour Government will honour that commitment, but the Prime Minister has said it will not be unveiling new UK commitments to climate finance through to 2035.
He told journalists on the way to Baku: “This exercise is not about domestic countries and the contribution they’re making, that’s about the Cop arrangement for what the sum will be to 2035. So I’m not making any commitment for the UK at this Cop at all on that front.”
At the summit, Sir Keir will argue that the climate transition presents an almost seven trillion-dollar (£5.43 trillion) investment opportunity.
The Government estimates that supplying the goods and services to enable the global net-zero transition could be worth £1 trillion to UK businesses by 2030.
Foreign Secretary David Lammy has also travelled to Baku.
The Government is also launching a new CIF Capital Market Mechanism on the London Stock Exchange which it says could mobilise up to 75 billion dollars (£58 billion) in additional climate capital for developing countries over the next decade.
“I will be making an argument powerfully that now is the time for the private sector to start paying their fair share in relation to these commitments,” Sir Keir said.
He said they would be launching the initiative because “I think it’s high time the private sector played their part in this”.
Sir Keir will hold a one on one meeting with the president of the World Bank on the fringes of the summit on Tuesday.
