What if Earth had a dense ring system like Saturn?

So, excluding the effects on space travel, what are some of the ramifications of Earth having a dense ring system like Saturn?<br><br>In the real world, Saturn's rings don't seem to significantly affect its atmosphere or oceans. Mostly, it's just a feature you need to include in the system's astronomy. But what if this ring system was the same mass or density as Saturn's? Would it affect weather/climate patterns? What about the seas? <br><br>Should rainbows be any different in such a world? Would the moon as we know it still be around?