Electric cars are often described as the obvious answer to urban air quality.
They produce no where people walk and breathe.
The harder question is where the electricity comes from.
A car charged from a coal plant simply moves the upwind.
Countries with a clean therefore gain far more from the switch.
A second is the itself.
If every household charges at seven in the evening, demand .
Utilities are testing that make late-night charging cheaper.
Early trials suggest that price alone shifts most of the load.
Batteries raise a separate set of questions about mining and .
Recycling plants exist but cannot yet handle the volume expected.
None of this argues against electric cars; it argues against treating them as sufficient.