In the past, the concern was twofold. Poverty and hunger high on the list. Today world poverty is declining at a rapid rate and hunger is also becoming a ‘none’ problem. This is not to say there still are pockets of both, but with time the catastrophic nature of these two concerns are becoming less and less. How has that happened? As in China, it is the great migration from rural areas to urban/city areas. From agriculture to industrial efforts. From poor income areas to higher income areas. Technology has affected both. Technology is becoming the driver for industrialization and technology is solving the problems of food production. Technology holds the key to advances in civilization.
With advancements in infrastructure caused by advancements in technology, more and more people can share in a broader economic market, that was the siren call of globalization, to internationalize the marketplace. From a restricted village as a market, farmers and factories can sell to a broader audience. First within a country then beyond to the world.
By which charges can be transferred to build up static electricity: charging by friction, by conduction, and by induction. Charging by Friction When two uncharged objects rub together, some electrons from one object can move onto the other object.
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Yes, I ship it but you shouldn't share your face in a public online forum. Just letting you know :)
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There are two reasons: at higher altitudes, there is less air pushing down from above, and gravity is weaker farther from Earth's center. So at higher altitudes, air molecules can spread out more, and air density decreases
In simple terms, chlorophyll makes a leaf look green because it reflects only green light.
Answering in a more detailed fashion, chlorophyll is a pigment. As a pigment it absorbs some wavelengths of visible light, (red, orange, yellow, green, blue, indigo, and violet are the colors of visible light), while reflecting others. In specific, chlorophyll absorbs all other colors of light but green, which it reflects. It is this reflection of green light that cause a leaf to appear green.
