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    "text": "And while the BO New Shepard rocket is not explicitly mentioned in report that gave the 75 tonnes estimate, the calculations were almost certainly made with this rocket in mind. \nBut rather than direct emission they were looking at indirect emissions from hydrogen production and rocket construction.",
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          "alt": "Screenshot of footnote 23 from the report that gave the 75 tonnes estimate for a space tourism flight:\nIn our lower bound estimates, the launch of a liquid H2 O2 rocket requires about 10 tonnes CO2 to produce the fuel transported by the rocket and another circa 60-70 tonnes in indirect emissions, associated to the construction of the engine, the on-ground transportation of staff as well as the heating/cooling of employees’ offices. These estimates are surrounded by large uncertainties and should be treated with care (our upper bound estimates suggest that a single flight could emit as much as several hundred tonnes of CO2). In order to get a more precise account of emissions associated to commercial space travel, it is critical that companies themselves produce detailed, systematic and transparent estimates associated to each flight. These estimates should not only refer to emissions at point of use (in the case of Liquid H2/O2 rockets, values are close to zero), but should also include indirect emissions (scope 3) associated to the launch.",
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    "createdAt": "2025-04-16T15:22:37.545Z"
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