Ecosia are a Berlin-based search engine, which plants a tree while their users search the web; being green certainly doesn’t get much easier than that.
The company uses profit that they make from searches to plant trees where they are needed the most (namely in areas which have been affected by deforestation or over-industrialisation).
Ecosia is a fully transparent operation, and it is possible to easily find their monthly financial reports and tree planting receipts online. Ecosia’s business model was tailored to generate as much financial support for tree planting as possible, and this is the core essence of the company.
It has paid off too. At the moment Ecosia has planted over 40 million trees and, by 2020, it aims to plant a billion. It also donates 80% of advertising revenues toward environmental protection.