<span>The Greenhouse Effect:
The greenhouse effect is a natural phenomenon, which, helps maintain the
relatively stable, livable, range of temperatures that we find on
earth. To better understand how this phenomenon works, scientists have
used the analogy of the greenhouse. In a greenhouse, the glass (the
atmosphere) allows the radiant energy (light) of the sun to enter. As
the radiant energy strikes various plants, gases, and objects in the
greenhouse, they heat up. Their heat is then released back into the air
of the greenhouse as infrared radiation (heat). This infrared radiation
cannot travel through the glass and remains inside the greenhouse,
increasing the temperature inside the greenhouse. Temperatures can be
controlled, or kept in balance, by allowing some of the heat to remain
inside and some to be vented to the outside. Under normal conditions,
the earth's atmosphere works in a similar manner. Solar radiation enters
the atmosphere and heats up the air molecules, the surface of the
earth, buildings, plants, and other objects. These objects in turn,
radiate infrared radiation back out into the atmosphere, where some of
this radiation is absorbed by the greenhouse gases, and some is radiated
out into space. As some of the heat stays in the atmosphere and some
escapes into spaces, a balance is maintained allowing our planet to have
a relatively stable range of temperatures. Scientists believe that as
the greenhouse gases become more abundant in the atmosphere, due mainly
to the burning of fossil fuels, they retain more and more infrared
radiation, allowing less and less to escape into space, tipping the
balance toward heating up the atmosphere, resulting in a changing and
warmer climate, planet-wide. This is the accelerated greenhouse effect.
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<em>Greenhouse gases are the gases present in the Earth’s atmosphere that produce the greenhouse effect,</em> they can have either a natural or a man-made source. The best-known greenhouse gases are carbon dioxide (CO₂), methane and nitrous oxide that even though they can be found naturally in low concentrations in the atmosphere, their proportion has increased due to various man-made sources.
<em>Emissions and removal of CO2 occur naturally because it is produced and absorbed by many microorganisms, plants, and animals through respiration, however, the burning of fossil fuels (coal, oil, and gas) and deforestation, the main man-made sources of CO2 in the atmosphere, break this balance. </em>
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<span>Punta del Este is a city in southern Uruguay. It is a very popular destination for tourists, in summer. You can see the colonial architecture, live in the resort houses, visit the beaches, pubs, and museums in this city. </span>
<span>Sedimentation and erosion of a stream can create channelization.
It can create numerous small channels to
flow. The erosion can create the banks of the stream to disappear quickly while
the sedimentation will reduce the depth of the stream, resulting in overflow
along the banks. This can create great amount of destruction. The new channels
can flood new areas and destroy both crops and livelihood. The sedimentation
can also give birth to new land due to constant deposition of silt. </span>
Explanation:The giant landmass described by wegener in his continental drift hypothesis has broken down into different slabs and they have moved to new positions. The giant landmass is called Pangaea. Pangaea is a super continent believed to have produced the continents today