Doug Stewart entered the newly deregulated, privatised electricity market in 2001 to establish 100Green, which is dedicated to sourcing electricity exclusively from renewable sources. Based in Hertfordshire, 100Green has developed a network of independent generators, generating energy using wind, solar, hydroelectric, and anaerobic digestion—where microorganisms digest organic material to produce biogas. Through these efforts, 100Green has become a supplier of 100% green gas. The company’s commitment to its green ethos has earned a number of awards, including the Which? Eco Provider recognition for three consecutive years.