Renewable energy Royal Dutch Shell Biogas Energy Centrica Sustainable technologies Bmp greengas Nature Power-to-gas Natural gas Low-carbon economy Renewable natural gas European Green Deal Electrical grid Sustainability Physical quantities Sustainable energy Efficient energy use Gases Carbon credit Technology Gasification Energiewende Renewable energy commercialization Climate change mitigation Sustainable development Energy development Fuel Carbon neutrality Electric power transmission Energy economics Energy and the environment Transport Electricity generation Energy Biofuel Fossil fuel Infrastructure Environmental technology Pipeline transport Greenhouse gas Biomass Natural resource Natural environment Commodity Market (economics) Energy management Waste Energy transition Renewable resource Chemistry News Economy and the environment Circular economy Anaerobic digestion Climate change Cogeneration Futures contract Power purchase agreement Feed-in tariff Manufacturing Resource economics Innovation Customer Energy production Trade International Energy Agency Heat Renewable fuels