Why a sliding scale?
Some folks is rich, some is poor. If everyone donates $60, BCP can pay Peter for his labor, insurance, bus overhead, as well as biodiesel, airport permits, and other miscellaneous fees. If everyone donates $75, then Burn Clean Project will actually have a budget for the first time in our three years of organizing renewable energy solutions for Burning Man! Any amount between $60 and $75 is all good; donate what feels right to you.