
It is hard to put a price on saving the planet - but Google now has an eye-watering tab to show for its attempt.

The tech giant spent an estimated $20million on an extravagant climate change bash for a host of A-list celebrities this week, flying hundreds of guests across the world and treating them to three days of luxury at a Sicilian seaside resort.

Today the celebrity guests, who included Prince Harry, Harry Styles, Naomi Campbell and Bradley Cooper, faced ridicule and accusations of hypocrisy for meeting in Italy to save the planet while leaving a huge carbon footprint of their own.

The 300 guests at the secretive camp, who also included Katy Perry and Orlando Bloom, mingled on $400million mega-yachts and cruised around Sicily in $200,000 cars before watching Coldplay's Chris Martin perform in ancient ruins which cost another $100,000 to rent - even before the show was put on.

Google picked up the tab for their flights, accommodation and entertainment during the three-day 'Google Camp', sending the costs spiralling.

With environmental costs thrown in - guests arriving in Palermo on 114 fuel-guzzling planes, roaring around Italy in Maseratis and enjoying the well-watered golf courses and swimming pools at their $903-a-night resort - the climate party quickly made a mockery of its grandiose intentions.

Britain's Prince Harry is understood to have given a passionate barefoot speech about saving the planet, although Buckingham Palace has refused to confirm his attendance.

'This is not something we are commenting on,' a spokeswoman told MailOnline.

Sources said Google laid on a private jet to take him to Sicily and a helicopter to ferry him from the airport at Palermo to the luxury resort of Verdura on the island’s south coast. Google did not respond to requests for comment.

The $20million climate change party: This diagram shows the huge cost - financial and environmental - of Google's extravagant summer bash where A-list celebrities gathered to discuss saving the planet

Singer Katy Perry and Belgian fashion designer Diane Von Furstenberg travelling to the event

A performance at the Temple of Hera at the Paestum Archaeological UNESCO World Heritage site where a host of celebrities gathered for the Google Camp climate change conference. Coldplay's Chris Martin was said to be the headline act

When pressed whether Harry had flown commercial or private the CEO of Palermo airport Giovanni Scalia said: ‘Being royalty you can guess which.’

If Harry did travel by private jet with five passengers aboard, rather than taking a commercial flight, it would have created around ten times more carbon emissions – putting around three tons of CO2 into the atmosphere. The prince would need to plant 190 trees in order to offset his one-way flight to Palermo, environmental group Trees For The Future said.

Prince Harry is said to be on the guest list alongside Barack Obama and Leonardo DiCaprio for Google's Italian climate change conference this week

BBC presenter Andrew Neil was among those to point out the irony, saying: 'Scores of celebrities and the rich have arrived in Sicily for a Google conference. They came in 114 private jets and a flotilla of super yachts. The conference is on global warming.'

Sources told Page Six that the total cost of the Google-funded showpiece would run to around $20million.

The combined carbon footprint of dozens of flights from Google's Los Angeles base to the Verdura resort would also come to around 780 tonnes of C02, although it is not clear where all the guests travelled from.

Perry and Bloom were picked up by David Geffen's $400,000 super-yacht before it continued on its way up the Italian coast.

The resort features thalassotherapy pools - a type of therapy using seawater - as well as well-kept, water-sapping golf courses and a selection of swimming pools and spas.

The most expensive rooms cost nearly $2,000 a night and the bill for the whole 300-guest party will have run into hundreds of thousands of dollars.

The summer party also splashed out energy costs on bright-coloured lighting at a Chris Martin concert in the ancient ruins.

Taking aim at the guests, Boston Robb said: 'Tree-hugging celebs take jets to extravagant Google Camp. Ahhh yes they'll all 'talk' about climate change once they all arrive privately in their own jets and yachts.'

Former U.S. House candidate Elizabeth Heng joined in the criticism, saying: 'How ironic. For all this talk about saving the earth, 114 private jets chartered to attend this conference. Eliminating carbon footprint, eh?'

Another Twitter user said: 'Look, in theory the google camp is a good idea but it's ironic that all the celebs turn up in private jets and superyachts... then talk about saving the world at a decadently extravagant Italian resort.

'Hope they spend some time discussing their own impact on the environment.'

One commenter described guests at the three-day event as the 'Greenerati' and scorned them for showing 'climate concern' while flying on private planes.

Gregory Taylor took aim at 'rich people most likely flying in on private jet and then lecturing us on climate change'.

Another Twitter user said: 'Is there anything more hypocritical than a bunch of rich people flying their private jets across the world to sit on yachts and discuss the future of our planet?'

Supermodel Naomi Campbell was among the guests and reportedly gave a speech about Nelson Mandela at the secretive event.

Orlando Bloom, Diane Von Furstenberg, Barry Diller arrive at the seventh annual 'Google Camp

Actor Bradley Cooper was seen arriving by car at the VIP summer retreat hosted by Google

The elite guests at the secretive Google Camp faced a backlash over their own carbon footprint after they arrived in expensive cars and private jets

The A-listers were branded 'hypocritical' and mocked as the 'Greenerati' after leaving their own considerable carbon footprint

Who are the Google Camp guests? The elite guest list at the Italian climate gathering is believed to include: Katy Perry Harry Styles Gayle King Diane von Furstenberg Prince Harry, Duke of Sussex Leonardo di Caprio Naomi Campbell Stella McCartney Barry Diller Bradley Cooper Chris Martin Orlando Bloom Ben Winston Jeff Azoff Massimo Bottura Rosalia Advertisement

Former President Barack Obama was also rumoured to be among those attending the event, but has not been spotted so far.

Orlando Bloom, Stella McCartney, Diane Von Furstenberg and Gayle King were also spotted arriving at the Verdura Resort in Sicily for the welcome dinner on Monday.

On Tuesday, even more guests arrived at the property, with Nick Jonas and new wife Priyanka Chopra leading the charge of celebrities heading to the island for the three-day conference which is believed to have begun on Monday and finished last night.

Styles was seen behind the wheel of a luxury car while driving with his friends Jeff Azoff and Ben Winston to the temple.

Spanish singer-songwriter Rosalia, who later performed on stage on Tuesday, posted an picture of herself getting ready for the event and then walking around the temple ruins.

Coldplay also performed at the temple on the final night on Wednesday.

Prince Harry also attended the event back in 2017 - and may have taken Meghan Markle along with him.

The pair made their first public appearance together at a polo match in Ascot in May that year, and a week after the Google conference she was spotted in London with her mother celebrating her birthday.

The event, created by Google co-founders Larry Page and Sergey Brin, sees some of the world's wealthiest business leaders and tech gurus discussing various issues in morning sessions before relaxing in the Italian sunshine in the afternoon.

This year's secretive camp, where social media is banned and the itinerary locked behind a password-protected site, will focus on tackling global warming.

According to Giornale di Sicilia, 114 fuel-guzzling planes are scheduled to land at Palermo, the nearest airport, between now and August 4.

Luxury megayacht the Andromeda, which is owned by billionaire Kiwi Graeme Hart has been spotted just off shore, as has Barry Diller's sailing vessel Eos.

A diagram showing where the secretive celebrity gathering is taking place

Katy Perry poses with businessman David Geffin in Spain. Both were at the Google event

Celebrities including Katy Perry, pictured, are attending the three-day conference in Sicily. She was dropped off on the megayacht Rising Sun, with other wealthy attendees bringing their private jets

Katy Perry pictured enjoying her time on the Rising Sun yacht earlier this week

David Geffen's yacht the Rising Sun dropped off Katy Perry (right) and Orlando Bloom (second left) on Monday, but then continued on its way up the Italian coast

David Geffen and Orlando Bloom sit together at a table on the Rising Sun

The Pirates of the Caribbean actor also shared several pictures of himself on a hike, including him praying in front of a cross

In another one of his Instagram shots, a shirtless Bloom posed atop a cliff above a stunning blue lagoon with the ship in the background

Another photo, taken from a different angle, showed he'd scaled a small rocky outcrop for the photo

Barry Diller shared a sneak snap of his luxury bedroom on the Rising Sun where his dogs have already taken over his bed

Orlando shared a photo of this plaque which he found on a hike which he says reads: 'In memory of Enric Alajarin i Mestre, make the stones of the hard path of life guide you to a cliff in which you will not find way out or a wall to lean on and rest to start over. Hoping that from the mountain summit, where you are, you could guide us in a path full of peace and hope.'

Vehicles parked at the Google Camp event where tech giants and celebrities flocked to Sicily for the VIP climate change conference

The Sicilian resort boasts two 18-hole golf courses, a tennis academy and one of the largest spa complexes in all of Europe on its over one mile of private coastline

US business magnate and film producer David Geffen being chauffeured to the star-studded climate change event

Some of these A-List stars were spotted in Monaco after attending the Google Camp. From left to right in the back: Sacha Baron Cohen, Noel Gallagher, Woody Harrelson, Lars Ulrich, Bono, Matthew McConaughey, Bill Gates. Front, from left: Guy Oseary and French photographer JR. Bono’s representatives have confirmed he was not in attendance.

114 private planes are expected to land at Palermo Falcone Borsellino airport for Google Camp

There was a heavy police presence at the Google Camp where a host of A-list stars turned up for the secretive event

David Geffen's Rising Sun did swing by briefly on Monday to drop off Perry and Bloom, but then continued on its way up the Italian coast.

As well as private jets and megayachts, there are buses to herd guests around and a helicopter pad.

After morning sessions, afternoons are free for guests to relax around the complex and spa, with trips around the coast, to local wineries and to tourist hot spots on offer.

The resort boasts two 18-hole golf courses, a tennis academy and one of the largest spa complexes in all of Europe on its over one mile of private coastline.

There are a number of suites and private rooms as well as three villas for guests to stay.

Those villas look out on to individual pools as well as the property's massive infinity pool and stunning private beach, filled with imported white sand, a jetty and even a small carpet to take pampered stars into the crystal blue ocean waters.

On the final night, Google spends close to $100,000 renting the 2,500-year-old Valley of the Temples ruins for a concert and sit-down meal, with Sting performing there last summer.

Google's VP of engineering Benjamin Treynor Sloss with his wife Christine headed to the event on Monday

Ciao bella: Google Camp guests are encouraged to bring their families, just like at the Allen & Company conference in Idaho that runs a few weeks prior, and there is no shortage of activities (Rosalia performing on Tuesday night)