In a summer where ‘double dip’ refers to the economy as much as to an ice cream treat, and with gas prices at the pump only one of dozens of higher costs associated with increasing oil prices, the need to lessen our dependance on foreign oil is acute. To that end, the environmental group Environment America has launched a campaign called Get Off Oil, and has a Facebook and Twitter presence dedicated to the cause. The focus, according to their Twitter feed, is: Why get off oil? Cleaner environment, less vulnerable to instability in the Middle East, save $$, increased…