BloombergNEF estimates that $21.4 trillion needs to be invested in electricity grids by 2050 to support a net-zero trajectory for the world. At least as much will be needed to build the large-scale solar and wind installations that, combined with small-scale solar, can power those grids with renewable energy. Most of the investment will have to come from the private sector. But private investors will only deliver low-cost capital to build green grids if governments create a secure legislative and regulatory framework for investment. To ensure a safe future for humanity, this must be done without delay in all parts of the world. The recent increase in interest rates for green investments in developing countries only makes this work more urgent. If so, private and public investors need to be in constant dialogue with lawmakers and regulators about what steps are needed to attract green grids investment on a massive scale. The Climate Parliament is convening this dialogue.