The Probe Ravaged Earth

'In an alternate reality where Spock died in childhood and James T. Kirk died while saving his son David Marcus from the Klingon Kruge, no mission was undertaken by the Enterprise crew to retrieve a pair of Humpback whales from Earth's past. Instead, the probe ravaged Earth unopposed for a period of about a week before finally moving off. In the aftermath, Earth's atmosphere was ionized, destroying the ozone layer, and torrential storms rained down across the planet, blocking out the sun and preventing agriculture.'
'Dr. Carol Marcus attempted to use a less powerful version of the Genesis Device to restore the atmosphere to its previous state; however, the Klingons chose to use the opportunity to invade Earth.'