Energy
________________________________________________________________________________________________________________________
12. Energy sources

Figure 6.11
Most of the Earths energy comes from the Sun.

Ultimately, energy from the Sun is the driving force behind weather and climate, and life on earth.

The original energy from the Sun is captured through photosynthesis and stored in chemical bonds as plants grow, which provide oxygen and food for the entire animal kingdom.

Dead organisms and waste products deteriorate into the fossil fuels used to power much of the world.
Scientific research asserts that these fossil fuel emissions lead to air pollution and acid rain.

Solar energy is created by nuclear fusion, in which nucleus of hydrogen atoms collide in the Sun´s core and fuse to create a helium atom. Each hour, the sun provides more energy to Earth than we need to meet an entire years’ worth of global energy demand.

Energy sources are materials used specifically for the generation of energy and power.

There are two types of energy sources, depending on their duration: non-renewable and renewable energy sources.

A

L

C