For any planet to have rings, it must have a strong gravitational field and a system of moons or other bodies that can provide a source of material to form the rings.
Although the Earth has a strong gravitational field, it does not have a planetary system. Even if space debris is piled up, it is not enough to form a ring. Simply, we have a ring system.There is no lunar system or other large objects around us that can provide the materials needed to make.
Additionally, Earth's proximity to the Sun means that any material in orbit around the planet is subject to the Sun's gravitational pull, causing it to fall back to Earth or leave the Solar System. In contrast, the gas giants (ring-holders) Saturn and Jupiter have large moon systems.
They have distinct ring systems because they have the most suitable environment for ring formation. If the post is worth it, go ahead and donate.