give me a quick summary of Here Comes the Sun by Bill McKibbon

Here Comes the Sun is a 2024 book by Bill McKibben that serves as a hopeful but urgent look at the rapid global transition to renewable energy.

The book focuses on how solar and wind power have become significantly cheaper and more efficient in recent years. McKibben argues that because these technologies have matured so quickly, the biggest barriers to solving the climate crisis are no longer technological, but political and social. He outlines how society can accelerate the shift away from fossil fuels by addressing these hurdles, emphasizing that while the transition is daunting, the path forward is clearer and more accessible than it has ever been.