Agence France-Presse: Nepalese villager Khinu Darai used to have to walk about five kilometres (three miles) every day to collect firewood so she could cook meals for her family. Then two years ago, she bought a biogas plant under a government scheme to encourage villagers to convert to greener energy — an event the 30-year-old mother of three says transformed her life. “Biogas is a blessing for my family. These days I don’t have to go into the jungle to collect wood,” she told AFP outside her …