The challenge is of size. Without the inflection of existing discharges of greenhouse gases, the global warming will reach 4 °C to 5 °C by 2100. But it is also a story of big money, with a potential loss of 10% of the global GDP, according to the Organization for economic cooperation and development. The initiatives are still recent, but of banks, management companies and platforms of crowdfunding are mobilising to propose investments that have a positive effect for the environment. Here are the most eco-friendly, some are not free of risks.

1. Lend via platforms of crowdfunding

"Since our inception, in 2014, around 11,000 investors have invested € 42 million to support 142 projects of renewable energies", calculate Laure Verhaeghe, co-founder of Lendosphere, platform leader of the sector. Among the projects recently proposed include a photovoltaic park in Mézières-lez-Cléry ...