Residence Inn by Marriott Portsmouth Downtown Waterfront
Residence Inn by Marriott Portsmouth Downtown Waterfront in Portsmouth, United States. 100 Deer Street
Residence Inn by Marriott Portsmouth Downtown Waterfront in Portsmouth, United States. Same price as direct booking, with a 1-tonne UN-verified CO₂ offset attached to every reservation, funded by IMPT from commission.
How IMPT pays for the carbon offset
Every booking on IMPT triggers a 1-tonne UN-verified CO₂ retirement on Ethereum, recorded against the booking ID. The offset is funded from IMPT's commission, not from the room rate — your price matches the property's standard direct rate.
Facilities
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