In the fragment of the text “Due in part to the turn away from oil in the 70s, today the United States produces just 0.7 percent of its electricity using pet...

In the fragment of the text “Due in part to the turn away from oil in the 70s, today the United States produces just 0.7 percent of its electricity using petroleum. Therefore, the price of oil has no direct impact on the price of electricity" (lines 25-28), the linking word therefore introduces the idea of