.The Mayan Indians regarded the jaguar as a symbol of power , and  .................................. the animal as a god

Solar power is simply the use of sunlight to create electricity. The Earth and our solar system get most of their energy from the sun. The sun, as the source of solar and most other forms of renewable energy, will continue to shine for some billions of years. The sun shines on plants, giving them the energy they need to grow and thrive. Animals then eat plants, which gives them energy, too.

Many of the Earth resources are used for energy. Wind, sun, water, fire and lightning are all sources of energy. In the United States, the most used sources of energy are fossil fuels such as coal and oil. Although oil gives us the gasoline that runs our cars, the huge consumption of fossil fuels has caused visible damage to the environment in various forms like air pollution.

Many scientists are working to develop new ways of providing energy without damaging the Earth. Through advances in research of alternative energy sources, the world is slowly changing from using fossil fuels to using wind power, water power, and solar energy. Windmills are used to capture wind power. Dams help to harness the energy from the water. Solar panels collect energy from the sun’s rays and keep it stored for future use. These are some kinds of renewable energy that we call “clean” because they produce little of any pollution.

What does the passage mainly discuss?

He frequently visits his old friends at his home these days. He takes great ... in talking about their good old days.