How green are supermarkets/malls?

In the UK, solely counting the major supermarkets we have over a thousand, visited by on average 300 cars per day = 300,000 trips at an average of 7 miles per trip = 2,100,000 miles per day, at 30 miles per gallon average = 70,000 gallons per day. These are conservative estimates. What about the world supermarkets. Also isn’t it about time that some countries stopped building houses solely from wood.
Some seem to have missed the point. how can it depend on the supermarkets and lighting when I was talking about the amount of fuel that is used in a single day in order just to get there and back to the market. I ijncluded gas guzzlers etc by giving an average. The fule consumption of the world given these scenarios is colossal.