yes, humans have purposely created islands in unexpected places - dubai, for example. but we've also accidentally made other islands, whose total size may add up to be TWICE THE SIZE OF TEXAS!
thats right: trash islands! off the pacific west coast of the US, 1000 miles northeast of hawaii, live several massive, synthetic, growing islands of our rubbish. our synthetic products and the whirling ocean currents have conspired together to create floating piles of plastic leftovers from our lives. we have multiple huge and expanding mountains of refuse living in the vortices of earth's oceans.
what can we do? reuse items that dont break up: plastics! reuse plastic bags, or get cloth bags that you can use infinitely! increase the use of biodegradable materials wherever possible. buy a cup or more permanent water bottle to drink from , instead of opening several plastic water bottles a day.
of course, as a single individual my efforts wont decrease the rate at which the galaxies of garbage are growing, but i think as a society, we have to get better at reusing what we buy. we just plain dont need all this *stuff* in our lives!