India has reached a milestone in its nuclear energy program through its state-of-the-art fast breeder reactor, signalling a major step forward for the clean energy transition in the world’s most populous country. The country’s most advanced nuclear reactor reached criticality earlier this month, meaning that the nuclear chain reaction powering the plant is self-sustaining. This breakthrough will ultimately allow India to import far less uranium to power its nuclear program, and can be adapted to use domestic thorium reserves for fuel…