Associated Press: On land poisoned by toxins from a long-gone manufacturing era, more than 6,500 solar panels face the south sky, capturing the sunlight of a late autumn day in the Berkshire Mountains. They’re ready to deliver power to New England. The Western Massachusetts Electric Co. site in Pittsfield, New England’s largest solar project, promises to produce enough electricity for about 300 homes starting later this month. That’s a tiny fraction of what the region needs to run computers, lights, TVs and…