I did enjoy it even though it felt as if Johnny Ball should have been presenting it.
Yes, it was fairly elementary stuff but it did highlight the interesting fact that even now we're still using steam to power our generators and still shovelling hundreds of tons of coal to do the job. There must be a more efficient way of generating electricity?
And talking of efficiency, how much electricity gets lost travelling down overhead power cables? Can't they insulate them more?
Insulating (electrically) the cable doesn't have any effect on losses.
INVESTIGATION INTO TRANSMISSION LOSSES ON
UK ELECTRICITY TRANSMISSION SYSTEM
A small percentage of the energy transferred over the GB electricity transmission system is lost
every year, due to physical processes such as resistive heating of transmission lines and
magnetic and resistive losses in transformers. This loss is typically of the order of 2% of the
energy transferred across the network. National Grid is incentivised to minimise losses as part
of the Balancing Services Incentive Scheme.