The Prince of Wales will participate in the key UN climate summit in the South American nation in the coming weeks, though the PM's participation remains unconfirmed.
The Prince will present the prestigious climate innovation prize and attend the gathering of officials from over 190 governments in Belém.
Climate specialists applauded the prince's presence. A sustainability expert noted that it would lift what is expected to be a challenging meeting, where global agreement on fresh objectives for cutting greenhouse gas emissions is required.
"Does Prince William presence at Cop a publicity move? Certainly. But it doesn't imply it's a poor decision," the expert remarked. "The summit has often been as much about what's termed 'optics' as it is about discussions. Prince William's announcement will probably inspire other delegates to engage, and will attract worldwide attention."
"It's likely HRH knows very well that by participating, he'll bring millions of eyes to the event. In an period when climate impacts are increasing, but media coverage is falling, any action that highlights the issue should be celebrated."
King Charles has attended past Cops, but is not attend in the upcoming event.
An expert from a sustainability organization said: "Full participation is needed – and every influential individual like Prince William, there assisting argue for the complex job that needs doing, is probably a good thing."
"[King Charles was the Prince of Wales when he attended the Glasgow summit and pitched in to motivate talks. I would argue it always requires the two royals to go."
The UK's leader has not yet said if they will participate in the conference, to which every international officials are invited, with scores planning to join. The leader was widely condemned by prominent sustainability leaders for seeming hesitant on the choice earlier this month.
"Global officials should be in Belém for the climate conference. Participation is not a courtesy, it is a test of leadership. This is the opportunity to establish enhanced national commitments and the funding to achieve them, especially for resilience" to the consequences of the global warming.
"International observers is watching, and history will record who was present."
An avid skier and travel writer with over a decade of experience exploring Italian slopes and sharing insights on winter sports.