The sun is the most important source of natural light, as the vast majority of the light we receive comes from it. The moon and stars are also sources of natural light.
Light is a form of energy that can be seen by the human eye. As well as natural sources, we also receive light from artificial or man-made sources. Burning wood, candles and animal fat are all ways of getting artificial light that have been used by humans for many years. In the modern era, light bulbs, fluorescent tubes, lasers and neon lights have also been used as artificial light sources.Learn More
Green energy refers to energy derived from renewable sources with a low environmental impact and includes solar, wind, geothermal, biogas and hydroelectric energy. Green energy sources don't create harmful greenhouse gases at the same rate as fossil-fuel energy sources.Full Answer >
The main disadvantage of coal mining is that it is very hazardous to the health of the people involved in mining, while also having serious negative effects on the environment. Another disadvantage of coal mining is that it is a nonrenewable energy source that will eventually run out, which means that it cannot be depended on as a permanent source of energy.Full Answer >
Japan's natural resources include fish, agriculture and small amounts of metals and minerals. Japan is notable for boasting strong industrial output and a high standard of living despite having very few natural resources, particularly in the area of natural energy.Full Answer >
Coal, oil and natural gas all produce heat energy when burned. These fuels were formed by the remains of organisms that existed millions of years ago. Heat from these fuels is used to convert water into steam, which is then used to power turbines that generate electricity.Full Answer >