Many people are concerned that laser pointers will hurt their eyes if they look at the laser light. So can laser pointers hurt your eyes? If you look at a laser pointer for a few seconds should you be concerned? The most common problem associated with laser pointers and the eye is a condition called flash blindness. Flash blindness occurs when the eye becomes dazzled after being exposed to a bright light. Most people have experienced flash blindness after having their picture taken by a camera with a flash.
The sun is the ultimate source of almost all kinds of energy on earth, either directly or indirectly. Fossil fuels (coal, oil and gas) are the transformed forms of plants (and animals) which once lived on the earth and grew capturing the energy of the sun. Biomass is a product of photosynthesis where the sun has the major role.
However, there are several important differences between biomethane and fossil fuel derived methane despite the fact that both are produced from organic matter. Natural gas is classified as fossil fuel, whereas biomethane is defined as a green source of energy.Like its name suggests, fossil fuel derived methane is produced from thousands or millions of years old fossil remains of organic matter that lies buried deep in the ground.ethane is about 20 times more potent greenhouse gas than carbon dioxide if released into the atmosphere. Furthermore, its use for power generation produces heat and emits carbon dioxide and some other gases but despite that biomethane has a number of environmental benefits which make it a green source of energy.