compressed natural gas will save us

7.7: gear/mobi/compressed natural gas will save us:
. after trying cycling with a mobile home,
it occurred to me that I might need
quite a bit of distance to find safe places to park it
given I spend time at the city's library
but there are often city-wide bans on car-camping .
. the healthiest economical engine
runs on compressed natural gas
and many cars are converting to this
(4 million in latin america).