Emission-free power is simply not possible. We could however, reduce emission by simply not using as much energy as we presently do.
Wars & war games, industry, sport, recreation and, to no small extent, frivolous entertainment are the principal guzzlers of energy & pollutants !
With some thinking & encouragement to think, much of these could be curbed massively.
What so many advocates of presently available green energy tend to overlook is that, it is not sufficient to put up solar panels & wind turbines.
The emission from producing these panels & fans would need to be covered by wind & sun to truly make it "Green" & "emission-free"! And, this is not from some idealistic viewpoint, it is from a realistic viewpoint
As long as we have to carry a generator in a wheelbarrow to power an electric lawnmower we don't have "Green" energy and, we're not reducing emission ! On top of all this we don't as yet have an "emission-free" method of disposing of no longer usable equipment let alone not even the faintest chance of refurbishing !
The 2050 "target" for 50% reduction emission will require at least a 200% increase in emission to just produce the facilities that produce the equipment and, God only knows how much more emission from the increased horde of bureaudroids to "manage" this production !

I mentioned a few months back about a possible pole shift reversal.
Sky news has apparently been talking about it recently.
Info here:

‘Vile racism’ against white people is infiltrating society: Rowan Dean
http://youtu.be/_P7rlMcj-aY
(It's mentioned at the start of the discussion)

One Solar "Expert" has predicted that by 2035 some 100,000 tonnes of solar panels will be added to Australia's waste !
Then there are the wind mills & none of these are recyclable !
Yes, "Green energy" isn't all that green after all !

Hey Indyvidual,
I think thats stupid and wasteful, most secondhand panels still produce 90+ percent output.
- They should put them into retirement where they can still produce power until they're completely exhausted.

We have had much discussion about panels and windmills producing electricity, but nothing is mentioned of TREADMILLS. Under my "Seniors National Service" system limitless amounts of power will be produced once my army of Old Timers are in harness (literally). I have a new motto for our old folk;

"A Kilowatt a day keeps the doctor away".....but maybe not the undertaker. Well nothings perfect.

With 2.5 million willing participants in my SNS I estimate they will produce 1 megawatt during daylight hours, and with peak demand at night, and with the necessary "inducement" they will produce 2 megawatts each in the dark! THAT's 7.5 gigawatts being produced at the new 'Pensioner Power House' and not a lump of coal to be burned.

most secondhand panels still produce 90+ percent output.
Armchair Critic,
What's the percentage of hail damaged solar panels left in place to still operate on a reduced output ? What about those panels that are no longer working ?

"A Kilowatt a day keeps the doctor away".
Paul1405,
What a great suggestion. Imagine the many public servants walking a treadmill whilst playing solitaire ? Or all the unemployables fresh out of Uni or in remote communities !