Prime Minister Rishi Sunak says he is delaying by five years a ban on new gas and diesel cars that had been due to take effect in 2030, watering down climate goals that he said imposed “unacceptable costs” on ordinary people.

The move angered green groups, opposition politicians and large chunks of the United Kingdom’s industry but was welcomed by some in the governing Conservative Party who chafe at the expense of ending the country’s reliance on fossil fuels.

At a news conference, Sunak said he was moving the deadline for buying new petrol and diesel cars from 2030 to 2035, weakening a ban on new natural-gas home furnaces due to start in 2035 and scrapping a requirement for landlords to make properties more energy-efficient.

He said he would keep a promise to reduce the UK’s emissions to net zero by 2050 but with “a more pragmatic, proportionate and realistic approach”.

In a statement designed at least in part to woo voters ahead of an election next year, Sunak rejected environmental proposals including new aviation taxes, measures to encourage car-pooling and taxes on meat – none of which has actually been introduced.

To meet net-zero goals, he said, the government will build more wind farms and nuclear reactors, invest in new green technologies and introduce new measures to protect nature.

Sunak argued the UK was “far ahead of every other country in the world” in transforming to a green economy but said moving too fast risked “losing the consent of the British people”.

“How can it be right that British citizens are now being told to sacrifice even more than others?,” he said.

UK greenhouse gas emissions have fallen by 46 per cent from 1990 levels, mainly because of the almost complete removal of coal from electricity generation.

The government had pledged to reduce emissions by 68 per cent of 1990 levels by 2030 and to reach net zero by 2050.

Sunak said those commitments remain.

But with just seven years to go until the first goalpost, the government’s climate advisers said in June that the pace of action is “worryingly slow”.

Sunak’s decision in July to approve new North Sea oil and gas drilling also spurred critics to question his commitment to climate goals.

Former prime minister Boris Johnson, who brought in the 2030 petrol car target when he was leader, said businesses “must have certainty about our net-zero commitments”.

“We cannot afford to falter now or in any way lose our ambition for this country,” he said.

Greenpeace UK executive director Will McCallum said Sunak “isn’t offering working people honesty or a brighter future – he’s putting his oil and gas cronies first once again”.