Everyone from Joe Biden to Greta Thunberg to Leo DiCaprio is in town, along with tens of thousands of delegates and activists.

It has been a week that Glaswegians won’t forget in a hurry.

Yes, there has been inevitable disruption for citizens, with road closures, protests and the refuse workers’ strike caused by SNP mismanagement.

But what is at stake is so important for the future of every community on Earth.

There is still some time to go before COP26 leaves the city and the hard work gets underway behind closed doors now.

The announcements so far are welcome.

The US and the EU have announced a global partnership to cut emissions of the greenhouse gas methane by 2030; the Indian prime minister said he will switch half the country’s power grid to renewable sources, and more than 100 international leaders have signed a declaration to halt and reverse deforestation and land degradation by 2030.

US climate envoy John Kerry has said he has never seen such urgency, commitment or energy in climate talks.

That’s the good news - but it’s not enough.

Over these remaining days, we need to move beyond pre-packaged announcements.

What really matters is whether we cut carbon emissions by half this decade – and we’re still a long way behind.

We need to secure a firm plan to keep 1.5°C alive and deliver for people at home and around the world in this decisive decade.

It is incredibly encouraging that Glasgow is shaping up to be a turning point in the global debate about the climate emergency.

It’s not just that COP26 is on home soil that we are hearing so much about it – nearly the entire world is taking it seriously.

The hope remains that our city will not only be remembered as the moment when leaders woke up to the crisis, but the moment a planet-saving deal was agreed.

That’s what is at stake here.

But, regardless of what is achieved in the international negotiations, we must start to lead by example at home.

While Nicola Sturgeon lectures the world on the global environment, her government is cutting cleansing budgets and neglecting the local environment.

Her government has missed its renewable heating target and its gas emissions target for three years running.

And the First Minister promised 130,000 green jobs by 2020, but we have just a fraction of that at around 21,000.

I imagine Nicola Sturgeon omitted this inconvenient truth when she met Greta this week.

The Scottish Government needs to use its sweeping powers to start delivering credible action here in the UK.

And the same goes for Boris Johnson.

The Prime Minister has had a wake-up call about the dire situation we are in.

Yet, unsurprisingly, he utterly failed to rise the occasion during his trip to Glasgow.

When he’s not dreaming up new metaphors for his incoherent speeches, he is flirting with a new coal mine, stripping out temperature commitments from trade deals, opening up massive new oil exploration and cutting overseas aid.

For the sake of Glasgow, Scotland, the UK and the world, we need loss hot air from our governments and more decisive action to reduce emissions.