082108bridgeleave.jpgHow many trees have to die before someone does something about Olafur Eliasson’s waterfalls? Earlier this month the Parks Department and the Public Art Fund admitted that the salty East River spray from the Brooklyn Bridge waterfall was making the leaves on trees at the River Cafe in DUMBO go prematurely brown. Now the Brooklyn Paper reports that the trees at the Brooklyn Heights Promenade are suffering from the same affliction, brought on by the salt slowing photosynthesis. Officials have assured tree-huggers that the spray from what BP calls Eliasson's "four-headed killing machine" doesn't pose any "long-term danger," but the way things are going, it's only a matter of time before some Earth First! activists start climbing up the falls to try and hang protest banners.