Environmental Finance: GE Energy Financial Services has now invested more than $4 billion in renewable energy – taking it two thirds of the way to its target of $6 billion by 2010. “We have reached the $4 billion milestone just five months after hitting $3 billion, confirming that renewable energy is our fastest-growing business,” said Alex Urquhart, president and CEO of GE Energy Financial Services. The unit of GE is to invest $100 million in three wind farms in New York State, under development …