You really have to get your terms of reference sorted out. Modern living has never been green and never will be. Ever since we started burning fossil fuels we have been "un-green." So what you are looking for is the least polluting method (which still isn't green). So the first thing is to stop the poor from travelling - why do we need to go to Spain or Orlando for a holiday? Stay at home for your holidays. Then you'll have to stop them (the masses) eating mange tout from Kenya. And you'll have to stop shipping - that really pollutes as do cars...
The ideas you have already are worthwhile and are savings worth having, but even if all added together will be but a mere a piss in the ocean.
The you have to do the green vs greenback maths. I could save a considerable amount of fuel by flying at minimum drag speeds, but would cost my employer a fortune. Is that what you want to hear?
I'm afraid Agaricus bisporus has got it spot on.
PM