In an essay discussing renewable energy sources, the following sentences are presented:
Sentence 1: Solar power is a growing energy source because it is abundant and renewable.
Sentence 2: Many countries are investing in wind turbines to harness wind energy.
Sentence 3: In addition, hydroelectric power has been used for decades to generate electricity.
Sentence 4: Overall, renewable energy sources are crucial for reducing carbon emissions.
Which option best organizes these sentences into a coherent paragraph?