Why do some quasars have redshifts greater than 1?

Related questions

• How are quasars formed?
• Are quasars galaxies or fast moving stars?
• Do quasars travel at the speed of light?
• Why are there no nearby, or in other words, young quasars?
• How is the luminosity of a quasar generated?
• Are quasars dangerous?
• Are there any Hubble Telescope pictures of quasars or have they only been detected by radio telescopes?
• What is the distance to the farthest known quasar from earth?
• What are other names for quasars?
• Can a quasar die?