Spoiler: Technological progress is making green energy cheaper. This is bad news for Putin. He became president when oil prices started to rise again. Putin has done nothing to reform the economy, so the Russian is still heavily dependent on fossil fuel prices. Energy related revenues constitute more than a third of Russian budget revenues.
World market demand for fossil fuels falls as countries strive to attain zero carbon emission targets. This will translate into low future growth for the Russian economy and make it difficult for Putin to fulfil his promises about higher living standards for the Russian people. Russian foreign policy will also have fewer instrument. The Kremlin won’t be able to use gas or oil to weaponize foreign policy when other economies become less dependent on fossil fuel.