Burning usually needs a permit. Here, you are not allowed to burn leaves or grass.
I started a compost pile. Just get 4 grade stakes, and a roll of chicken wire fencing. Just throw the clippings in there and let them decompose. Then you have great compost for a flower garden, patching up bare ground on the lawn, ect. or you can sell it or give it to your friends. Compost is valueable as it is rich in nutrients. Oh, if you want to compost it faster, buy some redworms and put them in the pile.
We use ours in the garden. We put them around the plants and the grass decomposes down and stops the weeds from growing so much. It works like a charm! Do you have a garden?
Another vote for using grass clippings for mulch. This year we used grass clippings and ground up leaf debris as mulch around shrubs and in the garden.
So far this has worked well and it neatly solves the problem of leaf and grass clipping disposal.