THE COaLITION Government's green credentials were called into question yesterday after it scrapped plans for a nationwide network of recharging points for electric cars.  The Department for Transport, which had planned to have 9,000 recharging points by 2013, has decided that the programme is not viable. The scheme offers matching funds to local businesses and public sector partners who install the points.  at present there are about 700 points. The 8,600 electric vehicles expected to be sold by the end of this year would require some 4,700 points.  In a new strategy document, the department said: "Most recharging is likely to take place at home and at work, so an extensive public recharging infrastructure would be under-utilised and uneconomic."  It wants most recharging to take place at night, a