BBC Inside Science How green is space travel?
Oct 24, 2024
Eloise Moray, an expert in atmospheric emissions, discusses the overlooked carbon footprint of space travel compared to traditional transport. Richard Lowe highlights the urgent need for sustainable practices in the booming space industry. Sean Fitzgerald shares insights on innovative experiments aimed at refreezing Arctic sea ice. Zoe Thomas reveals fascinating evidence of an ancient rainforest in the Falkland Islands, while David Steele addresses the concerning decline in seabird populations and conservation efforts on the Isle of May.
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Rocket Emissions and Atmospheric Impact
- Rocket launches emit pollutants like nitrogen oxides, black carbon, alumina, chlorine gas, and water vapor into multiple atmospheric layers.
- These emissions have varying negative impacts depending on the altitude of release.
Space Industry vs. Aviation Industry: Scale of Launches
- The space industry generates a comparatively smaller number of launches annually (around 200) than the aviation industry (tens of millions).
- However, each launch has a potentially greater individual environmental impact.
Rockets' Impact on the Ozone Layer
- Aircraft emissions reach up to 12 km, but rockets emit up to 100 km, affecting the ozone layer more directly.
- The ozone layer protects us from harmful UV radiation.