system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why aren't we doing anything about the colossal amount of trash in the pacific ocean?
gpt
Because it isn't what people think.

The Pacific gyre is filled with plastic, it's a huge problem, but the plastic is millions of tiny pieces suspended in the water. 

To 'do something' you'd have to filter billions of gallons of water without killing every living thing in it and then find some way to remove the plastic accumulation from the local biomass without again killing everything.