True, in the main, but as for conserving energy? Hmm, I suspect most digital broadcasting does two things with energy consumption. 1. increases energy consumption overall and 2. shifts it towards the consumer.

Sure, consumption during broadcasting can be much less. Reduced Tx. power for a DAB Tx and minimal for streaming. (More if it's streaming over 3g/4g of course). But an ordinary analogue radio is very efficient and consumes little power. It simply recieves an audio waveform on a carrier, demodulates it and amplifies it. A digital reciever, be it DAB, DVB-T, Wifi, tablet, laptop or phone, is essentially a computer. It has multiple elements to power (processor, memory, screen etc.) and has to do a lot of processing to de-code re-constitute a digital stream into an audio waveform. It'll probably generate a fair bit of heat too! How long could you run any of these devices on a set of AA's, compared to an ordinary AM/FM radio?

So, while energy consumption at the Tx end is vastly reduced, assuming you have plenty of listeners, the overall energy consumption is likely to add up quite considerably. The broadcasters/governments pushing the technology seem to overlook that aspect. I wonder why?

Kind of. In the case of digital radio, more environmentally friendly to produce. Less environmentally friendly to consume.

So Caroline has got itself on both DAB and am (1368 kHz)! Thats good going!