Given that H2 is only an ineffective gaseous energy store at present, whether or not there is CO2 depends on how the power is produced. Such an inefficient energy store makes it more difficult to accomplish tasks on any given renewable energy budget and more likely that non-renewable energy is required as an energy source.


I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.