For example… BMW sees the future vis-a-vis tough emmisions regulations in the EU and is moving more and more towards electric and plug-in hybrids. This will clearly impact the cars they offer in other parts of the world, and will also influence other automakers.
(By way of Paul Graham https://twitter.com/paulg)
I realize that the cars will only be as “green” as the electricity they use, but here is a US map that analyzes how green the electricity grid is when used for an all-electric car:
“… Below is a map of the updated regional estimates for global warming emissions for the 26 electricity grid regions across the US. Compared to our previous analysis, nearly every region of the country has improved emissions for EVs. ”
So you’re going to build an already-small superinsulated “pretty good house” (look it up). And you’re thinking of doing double-stud walls. Just remember that the extra 6″ or so adds up. It’s on both sides of the house, so it reduces the usable space by 1 foot in each dimension — x and y.
Let’s say you are building a boring rectangle that is 24×32 (inside dimensions). Well, that’s a 768 sqft. If you had instead built 25×33 (with single stud walls) then that is 825 sqft interior. In other words, you are giving up 57 square feet with your insulation. And that’s 7% of 825. So your house is now 7% smaller!!! Just be aware.
Instead you could do:
1) larsen truss
2) 4″ of polyiso added to the outside.
These are probably both harder than double-stud walls, I am just commenting that you should compare apples-to-apples — same interior square feet — when comparing options for how to build.
Article title could read… if everyone lived in an ecovillage and DIDN’T FLY… (old news that flying wrecks one’s footprint score since it makes it so easy to go so far….) https://theconversation.com/if-everyone-lived-in-an-ecovillage-the-earth-would-still-be-in-trouble-43905
GOLDSTEIN: John is not rich and he is not getting solar panels to save the world.
Does the environmental part of it – is that meaningful to you? Does that matter?
O’HAGAN: Not really. (Laughter).
GOLDSTEIN: If you were an environmentalist or if you just like solar power, John O’Hagan is your dream come true. John O’Hagan is the revolution you’ve been waiting for. He’s – he is not getting solar power for a moral or philosophical reason. He’s not doing it ’cause he’s worried about climate change. John O’Hagan is getting solar power because it’s cheap.