TOEFL Reading Practice #1

Instruction: Read the passage below carefully and answer the questions that follow.

Passage: The Evolution of Renewable Energy Sources

The increasing need for sustainable energy solutions has brought renewable energy to the forefront of global discussions. Renewable energy sources such as solar, wind, and hydroelectric power have rapidly expanded their roles in the energy landscape over the past few decades. These sources, characterized by their ability to replenish naturally, offer a cleaner alternative to fossil fuels, which are not only finite but also responsible for significant environmental damage.

Renewable energy is not a modern concept. Historically, humans have harnessed renewable energy for centuries. Early civilizations utilized wind to sail ships and grind grain, and the sun’s energy has been used for heating since ancient times. However, it was not until the industrial revolution that nonrenewable energy sources like coal and oil overshadowed renewables due to their higher energy density and reliability.

The 20th century marked a turning point in the development of renewable energy technologies. Governments and private organizations began investing heavily in research and development. Wind turbines grew more efficient, solar panels became more affordable, and hydroelectric dams were constructed on a larger scale. Despite these advancements, renewable energy sources accounted for a relatively small percentage of global energy consumption during this time.

One major challenge facing renewable energy is variability. Solar and wind energy depend on weather conditions, making them less predictable than traditional energy sources. To address this issue, scientists have developed energy storage solutions like batteries that can store excess power generated during peak conditions. Moreover, advances in grid technology have made it possible to integrate renewables more effectively into existing power networks.

Looking ahead, renewable energy is poised to play a central role in combating climate change. Many governments have implemented policies and incentives to accelerate the transition from fossil fuels. For example, tax credits for solar installations and subsidies for wind farms encourage adoption on both individual and industrial scales. Furthermore, international agreements such as the Paris Climate Accord emphasize the importance of renewable energy in achieving global emission reduction targets.

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