Britain has pledged to reduce its net greenhouse gas emissions to zero by 2050. Sadly these promises are not close to being met'.
Mr Johnson and Sir David were joined by Italian PM Giuseppe Conte, whose country will co-host November's UN COP26 summit in Glasgow.
A Scottish Government spokesman said: "Discussions are of course taking place in relation to costs, as with any major event, and Scottish ministers expect that all costs associated with COP26 will be borne by the UK Government".
However, speaking at the Conservative party conference last October, transport secretary Grant Shapps hinted at bringing the date forward. "And my message to you all this morning is that they are wrong", he said. We must question whether we will have a sufficient supply of a full cross section of zero emissions vehicles in less than 15 years.
Australia is many years away from a similar move to the UK's ban, but if more nations around the world follow Britain's lead, auto companies will be forced to divert more resources into fast-forwarding production of electric vehicles to suit demand.
However, registrations of electric vehicles rose 144 percent between 2018 and 2019, according to the Society of Motor Manufacturers and Traders.
'However, with current demand for this still-expensive technology still just a fraction of sales, it's clear that accelerating an already very challenging ambition will take more than industry investment.
Mike Hawes, chief executive at the SMMT, said the continued fall in sales in January was "unsettling", especially given that appetite for new cars tends to be a measure of the strength of the nation's economy.
But the move was welcomed by environmental groups.
Britain's commitment to reducing air pollution began in 2017, when the government revealed long-term plans to stop relying on internal combustion engines. Boris Johnson failed to enact legislation parliament passed to tackle the climate emergency over the past year.
"In the meantime we urge the Government to extend the plug-in auto grant for at least another three years to help those that want to go electric, but who are put off by the high initial costs", he said. There is now no national scheme for home insulation and energy efficiency - the last one was abandoned almost five years ago - and onshore wind farm construction levels have fallen sharply as government support has been withdrawn and planning obstacles put in the way of new turbines.
Professor Burke said the sacking of Ms O'Neill was justified because she lacked "the Prime Minster's ear and authority" but he asked: "Why on earth get Dominic Cummings, an aide, to phone someone up without warning and sack her in such a public way ... and without having a replacement ready?"
The prime minister added that, ideally, the ban would be introduced even earlier than 2035.
He said: "It is absolutely fantastic, we lead the world with our ambitions and we have a wonderful summit in Glasgow".
"The annual United Nations talks are dogged by endless rows over agendas, ongoing unresolved splits over who should pay and insufficient attention and funding for adaptation and resilience", she said.