Near-Earth space is full of high-energy particles that are trapped in the Earth’s magnetic field. These particles form the radiation belts and create an extremely hazardous environment that satellites must pass through. Understanding how radiation belt particles move, how they become energised and how these particles can be lost from the radiation belts is essential to protect satellites orbiting the Earth. In this talk, Harriet George will present an overview of the Earth’s radiation belts and its dangers.