The favorable influence is that:terres-trial magnetic field screens the earth from the most high-particle and cosmic rays and ensures people avoid hurt.

• 不利的影响是指:当地球磁场变化的幅度超过了人体所能忍受的阈限值时,这种变化会诱导人体出现一系列的疾病,如:心脑血管疾病、精神病、青光眼等等。