What is a blanket of hades around the earth?

The "blanket of Hades" is a metaphorical phrase that can refer to the Earth's atmosphere or the layers of gases that envelop the planet, providing protection from harmful solar radiation and maintaining life-supporting conditions. In some contexts, it may also evoke imagery of the underworld or death, suggesting a barrier that separates the living from the dead. However, it's important to note that this phrase is not a widely recognized scientific term.