How does a power factor less than one negatively impact the grid's efficiency?

Answer

It necessitates carrying a higher current to deliver the required real power, increasing I²R losses

When the power factor lags below unity, the system must transmit more total current to achieve the same amount of usable power, thereby increasing the energy wasted due to resistive heating.

How does a power factor less than one negatively impact the grid's efficiency?
resistanceenergytransmissionLossconductor