The Department for Enterprise says a half-hour show by the Red Arrows is the greenhouse gas equivalent of driving around 125,000 miles in a Ford Fiesta.
A Freedom of Information request to the department asked for details about the emissions from the RAF display team during TT.
In its response, the department said 2023 figures showed a half-hour show by eight planes produced 26,194 kilos of CO2 - but noted the TT show doesn't last half an hour.
A five-door Ford Fiesta produces around 130 grams of CO2 per kilometre.
Steam Packet sailings delayed tonight
PPE Medpro put into liquidation
Part of TT course closed tomorrow
Carl Cox backs cancer charity's TT fundraising auction
Business appeal over thousands in unpaid bills
Pharmacy plans for former IOM Bank
Appeal after wood from van damages car
Island part of union data breach investigation