The first in line to the throne travelled 125 miles between Highgrove and Cambridge to deliver the address according to Mail Online. It was made at Cambridge Universitie’s Whittle Laboratory.
According to the paper Prince Charles would have produced around 2.5 tonnes of carbon emissions during the trip.
The journey is estimated to have cost £12,000.
However had it been made by car it would reportedly only used 0.2 tonnes
Mail Online reports Prince Charles used his speech to urge people to “act quickly to rescue this poor planet”.
Prince Charles travelled to Cambridge Universities Whittle Laboratory by helicopter (Image: GETTY)
Prince Charles at Cambridge Universities Whittle Laboratory (Image: GETTY)
In a statement to the paper Clarence House justified the Prince’s decision.
It said: “The prince is not personally involved in decisions around his transportation arrangements, though he ensures all carbon emissions are offset every year.
“They are made based on what is possible within the constraints of time, distance and security.
“In order for him to undertake as many engagements as he does across the UK and around the world he sometimes has to fly.
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“The prince is not personally involved in decisions around his transportation arrangements" (Image: GETTY)
“As he has often said, as soon as there is a more sustainable way of making