I read an excerpt from a story (involving the atomic bomb.. and how humankind was destroyed) and I'm pretty sure it was by Ray Bradbury.

I'm interested to know the title because of a poem in the story.. the poem went something along the lines of "and mother nature scarcely noticed that we had gone".

Again I'm unsure if it is by Bradbury but I'm pretty sure it is?

But eh, some help please!

Embroidery
?
There will Come Soft Rains
?

The poem is from a Bradbury piece, I am sure.
I may be way off on the story titles, tho. Probably am. But stay tuned. Others will clue in I am sure...

"And Spring herself, when she woke at dawn
Would scarcely know that we were gone."

Yep, this is from the story "There Will Come Soft Rains" which can be found in The Martian Chronicles. (That must be one of Bradbury's most famous short stories, I would think...)

The poem itself is by Sara Teasdale, from Flame and Shadow.