Phaeton's Flare, a solar flare as strong as the one in Syntactic Labyrinths would destroy our ozone layer. The hole would only keep growing from further damage.
Without protective filtration our forests would burn and the oceans would boil. But first, it all started with one blast...
[1]: Dreams of Blauw are any form of crystallised thought based on honest expression. Sometimes they linger a shade of blue in your after-image.