Anaerobic digestion is the process by which organic matter such as animal or food waste is broken down to produce biogas and biofertiliser. This process happens in the absence of oxygen in a sealed, oxygen-free tank called an anaerobic digester.

Biogas is the mixture of gases produced by the breakdown of organic matter in the absence of oxygen (anaerobically), primarily consisting of methane and carbon dioxide.

Biogas upgrading to biomethane, also known as biogas purification, is a very attractive alternative compared to using a combined heat and power (CHP) system that generates electricity and heat.

Virtual pipelines bring regular deliveries of gas to customers lying outside the reach of existing gas distribution infrastructure.

Waste-to-energy (also known as energy-from-waste) is a complicated technology in the realm of renewable energy.

Carbon sequestration or carbon dioxide removal (CDR) is the long-term removal, capture or sequestration of carbon dioxide from the atmosphere to slow or reverse atmospheric CO2 pollution and to mitigate or reverse global warming.

Use of algae, especially the cyanobacteria (blue-green algae), for antibiotics and pharmacologically active compounds has received ever increasing interest. There are a range of pharmaceutical products derived from algae.

Renewable energy is useful energy that is collected from renewable resources, which are naturally replenished on a human timescale, including carbon neutral sources like sunlight, wind, rain, tides, waves, and geothermal heat.

Electricity generation is the process of generating electricity from primary energy sources, such as coal, natural gas, nuclear, solar, or wind energy. The power plant generator is a device that converts mechanical energy obtained from an external source into electrical energy as the output.

Petrochemicals (sometimes abbreviated as petchems) are the chemical products obtained from petroleum by refining. Some chemical compounds made from petroleum are also obtained from other fossil fuels, such as coal or natural gas, or renewable sources such as maize, palm fruit or sugar cane.

Privately, publicly or cooperatively owned lines, facilities or systems for transmitting or distributing electricity, lighting, data, communications, gas, oil and petroleum products, water, storm water or sewage, wireless, or other similar commodity or substance which serve the public directly or indirectly, including underground, surface and overhead facilities as well as facilities which use common poles, ducts or conduits on a shared basis, and all related infrastructure.