Two major ballot initiatives, each emphasizing the need for clean power and renewable energy amid the public's rising concerns over greenhouse gases, will confront California voters in November. On their face, they appear to be straightforward environmental proposals. But all is not what it seems. One initiative is being bankrolled by the nation's largest purveyor of vehicular natural gas. And though it's being sold as an environmentally friendly initiative, the measure's sponsor--as well as other energy purveyors--presumably could make millions of dollars if it is approved by voters.