Two thoughts:
Thich Nnat Hanh said something along the lines of "if you think you're enlightened - try spending a weekend with your parents" - ie, everyone bickers with their family to some degree
And, I forget where on The Internet I read it, but something like:
"I used to have a house between two subdivisions, and people thought the edge of the yard was a path between one division and the other. They used to walk across it, and it bothered me. I sold the house - people are, I'm sure, still walking across that yard, but now it doesn't bother me at all" - meaning - there are plenty of (sub optimal?) things in the world - your family doing their utmost to trash the planet being one - and I know it's personal because they are *your* family - and if they were someone else's family you'd still care but just in the general mess of how we're all fucking up the place...
Sucks, but the best you can do is just be a positive role model. If you're perfect (you aren't! See Thich Nhat Hanh) you'll just be able to respond with a smile, and gentle advice when asked.
Good luck - hope it works out for you this time - my friends and family are thousands of miles away too and it makes me quite sad :-/ Thankfully, Skype and email!