(Portland, OR)  --  Portland and Multnomah County leaders are vowing the city and county governments will convert 100-percent to clean, fossil-fuel-free energy by the year 2050.  Officials say the goal is to provide the community's electricity through renewable resources by 2035, with all other energy resources shifting to renewables by 2050.  Portland Mayor Ted Wheeler says while the plan is ambitious, "we have a responsibility to lead this effort in Oregon."  The Portland Development Commission says the shift to clean energy has created an economic boost for the area.