invasive grass to be identified

Question

a fast growing and spreading light green vertical growing grass [or weed]

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Answer 1

Figuring out grasses when they are not in seed (flowering in the grass world) is woefully difficult. However, fast-growing, upright, light green and spreading describe yellow nutsedge. This grass is easy to pull but you don't get the continuous underground root that connects the plants so it pops up again. I hope you find that linked article useful: https://www.gardeningknowhow.com/plant-problems/weeds/yellow-nutsedge-control.htm