The  Paris climate change pact , which  entered into force  last year, was announced with a huge fanfare. The deal aims to limit the rise in average global temperatures to “well below” two degrees Celsius, compared to pre-industrial levels.

The use of small wind turbines (SWTs) is growing in appeal thanks to a changing trend in the energy sector, from a centralised system to a distributed one.

It's a brand new sector: the first steps date back to 2012. Today energy crowdfunding is a way of financing solar panel or wind turbine projects.

Urban mining is increasingly being taken seriously by industry because it gives access to materials—such as expensive metals used in electronics—that are buried in waste tips and landfills.