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the type of problem that exist are overcrowding within certain places such as some areas in Asia. pollution which is caused by the burning of coal and other fossil fuels for energy which tears the ozone layer into pieces and cause smog within city cause harm to people with asthma or other breathing problems and acid rain which causes harm to the environment and causes global warming which melts the ices caps.
how we contribute, is to use more efficient and clean energy sources such as solar power, wind turbines, hydroelectricity ( the use of water within dams tp create energy), etc. recycle products after use such as soda cans, plastic bottles, etc.
this is all i could come up with i hope this helped
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Spanish and Italian immigrants
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I'm from Argentina
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C. compound layering
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Layering is a means of plant propagation in which a portion of an above-ground stem grows roots while still attached to the parent plant and then detaches as an independent plant. Layering has evolved as a common means of vegetative propagation of numerous species in natural environments.
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Alternative Name: The Killer Fog of 1952
Great Smog of London, lethal smog that covered the city of London for five days (December 5–9) in 1952, caused by a combination of industrial pollution and high-pressure weather conditions. This combination of smoke and fog brought the city to a near standstill and resulted in thousands of deaths. Its consequences prompted the passing of the Clean Air Act four years later, which marked a turning point in the history of environmentalism.
The phenomenon of “London fog” long predated the crisis of the early 1950s. Known as “pea-soupers” for their dense, yellow appearance, such all-encompassing fogs had became a hallmark of London by the 19th century. But polluted fog was an issue in London as early as the 13th century, due to the burning of coal, and the situation only worsened as the city continued to expand. Complaints about smoke and pollution increased in the 1600s, when ultimately ineffective legislation was passed under King James I to restrict coal burning. Rapidly increasing industrialization that began in the late 1700s made conditions even worse.
These hazes were not natural formations of the atmosphere: water vapour would stick to particulates released by coal-burning factories, producing dark and heavy clouds that impaired visibility. This variety of fog later came to be known as smog (a merging of the words smoke and fog), a term invented by a Londoner in the early 20th century.
<u>hope i helped you in some way ^^</u>