Business Green: Fresh from securing $1m in additional funding, San Francisco software start up CarbonFlow has announced that it is just a month away from releasing the first version of its software platform, designed to make it easier and more cost effective for firms to partipate in the booming carbon offset market. The latest investment was provided by venture capitalist @Ventures and follows a $2.9 million round earlier this year from Clean Pacific Ventures, OVP Venture Partners and Meridian …