Stuff Invisible News Today

Says any tax dollars available go toward critical city services and thats it. supporters contend some of the mayors top priorities might be among the project that get the most votes. he says he hopes so and even he admits that participatory budgeting is getting more people involved by giving them more of a say in how their tax dollars are spent. shep? >> shepard: claudia cowan live in san francisco. if you cant see it, is it there? scientists say they are one step closer to making stuff invisibl...