Scientists have proposed an innovative method to warm up Mars, potentially by 50 degrees Fahrenheit. The plan involves seeding the planet's atmosphere with reflective metallic nanorod particles, commonly known as "glitter." According to calculations, this could trap existing heat and scatter sunlight across the Martian surface, boosting its natural greenhouse effect. While this approach may seem unconventional, experts believe it could be up to 5,000 times more efficient than previous terraforming methods.

Source: https://www.popsci.com/science/mars-glitter-terraform/