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From Universe Today:
Space may be big - vastly, hugely, mind-bogglingly big - but the space around Earth is beginning to get cluttered with space junk. This poses a threat, not only to other satellites, space stations and missions, but to us here on Earth as well. While we wrestle with environmental issues posed by human activity on our planet, ESA's new 'Clean Space' initiative aims to address the same issues for its missions, making them greener by using more more eco-friendly materials and finding ways to cut down levels of space debris.
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