When we launch satellites and rockets to space, we’re often carrying really expensive goods and systems, basically robots, that operate in space for maybe a decade or so. And because launch is so expensive, the goal has been, to try not to launch a new thing until the old one is replaced. Now, the challenge is, what do you do with the old one? Sometimes the satellites are low enough to the earth that they can actually be brought back down safely, and they can actually enter the atmosphere. But some satellites are operating pretty far away from the earth. This area is called the geostationary belt. It’s about 36,000 kilometres away from the surface of the earth. We have a whole ring of old trash satellites that are operating just a little beyond this very useful orbit. And it’s a concern because going forward, we don’t know a way to destroy those or use them safely. As we send up new missions, we are going to see more concerns about objects creating the possibility of collisions, and they create debris that can be endangering to other missions. How do we make innovation, both in policies and technology, to make earth and space more sustainable in the future? One example of how we can address this topic is by asking how we can use beeswax and candle wax as fuels for satellites. Many fuels for satellites in the past have been expensive, and also toxic to humans. One such like, hydrazine, if you use them for part of a satellite mission, they’re both dangerous for you to handle as a human, but also create a need for special equipment and safety features that make the whole mission more expensive. Many of the smaller satellites that are being proposed for the missions like communication systems, don’t have systems for propulsion, meaning they don’t have a fuel to move themselves around in space.