Hawaii’s latest project to preserve its natural beauty converts treated sewage into natural biogas, a renewable energy carrier. The Hawaiian government recently authorized Hawaii Gas to use the waste products from sewage treatment plants in order to create renewable natural gas. This represents another step toward the US state’s target of becoming 100% green over the next 20 years. One of the reasons for this effort is to avoid the negative effects of volatile fossil fuel markets. According to Alicia Moy, president and CEO of Hawaii Gas, ''Adding renewable natural gas to our fuel mix is an important priority that will contribute to advancing Hawaii’s clean energy future''. The contract is valid until 31 December 2024 with the possibility of renewal.