Why are The Birds here?

There seems to be a real trend in remakes where they want to 'explain' away anything that was mysterious or ambiguous. The remake of THE BIRDS appears to be no different according to Cathy Schulman, president of Mandalay Pictures.

“We think we have a very contemporary take,” Schulman said. “In the original, the birds just showed up, and it was kind of like, why are the birds here? This time, there’s a reason why they’re here and (people) have had something to do with it. There’s an environmental slant to what could create nature fighting back.”

Maybe the birds will attack Al Gore for tricking me into watching a Powerpoint presentation instead of a film!