1. Big “if” on decarbonised electricity. 2. There are a number of other side effects unrelated to carbon emissions that come from driving around in a vehicle th

1. Big “if” on decarbonised electricity. 2. There are a number of other side effects unrelated to carbon emissions that come from driving around in a vehicle that weighs 5 tons. Battery capacity scales linearly with weight, but weight scales exponentially against wear and tear on road surfaces. Perspective: 5 tons is the lower limit for the US shipping registry.