No single country can solve #ClimateChange, as no single country caused it on its own. All industrialised countries have contributed to it, and all countries must contribute to the solution.
However, that doesn't mean that not every single contribution counts! Now that we have failed to keep warming below 1.5 degrees, it is time to stop waiting for other countries to take the lead, or for future innovations to absolve us, and start doing what we can.