A recent CBC broadcast highlighted the potential environmental impact of increasingly frequent rocket launches. The discussion centered on the fuels used in these launches, specifically liquid oxygen/hydrogen combinations and solid rocket boosters, and their effects on the Earth’s atmosphere.

According to the broadcast, while the combustion of liquid oxygen and liquid hydrogen results in water, the environmental consequences of solid rocket booster fuels are less understood. Astrophysicist Erika stated during the program that studies are currently underway to assess the impact of these launches, particularly concerning the release of aluminum particles into the atmosphere.

These particles, the broadcast explained, are released not only during liftoff but also during the reentry of satellites and spacecraft, such as the upcoming Artemis II crew reentry. Despite the growing number of launches, especially with companies like SpaceX utilizing reusable rockets, Erika noted it is “still a little too early for us to know for sure what the long-term effects are.”

The conversation also touched upon the ethical considerations of space exploration spending, given competing global priorities. The broadcast did not elaborate on specific ethical arguments, but acknowledged the question of responsible spending when governments face challenges like affordability, trade, war, and climate change.