تعبير انجليزي عن global warming
موضوع عن الاحتباس الحراري مختصر
جمل عن الاحتباس الحراري
موضوع تعبير عن الاحتباس الحراري
موضوع مختصر عن الاحتباس الحراري بالانجليزي
نتائج الاحتباس الحراري بالانجليزي
ترجمة كلمة الاحتباس الحراري
اسباب الاحتباس الحراري باختصار
the causes of
global warming
تعبير الاحتباس الحراري بالانجليزي
موضوع عن الاحتباس الحراري مختصر
جمل عن الاحتباس الحراري
موضوع تعبير عن الاحتباس الحراري
موضوع مختصر عن الاحتباس الحراري بالانجليزي
نتائج الاحتباس الحراري بالانجليزي
ترجمة كلمة الاحتباس الحراري
تعبير عن الاحتباس الحراري بالانجليزي قصير
اسباب الاحتباس الحراري باختصار
The
causes of climate change
Causes
and consequences of climate change
Human
activities such as the use of fossil fuels, the exploitation of tropical
forests and the raising of livestock have an increasing influence on the climate
and the temperature of the earth.
These
activities release enormous quantities of greenhouse gases, in addition to
those naturally present in the atmosphere, thus enhancing the greenhouse effect
and global warming.
Greenhouse
gas
Some
gases in the earth's atmosphere act like a greenhouse wall: they allow solar
energy to enter the atmosphere but prevent it from escaping.
Many
of these gases are naturally present in the atmosphere, but human activity
increases the concentrations of some of them in the atmosphere, in particular:
• carbon dioxide (CO2);
• methane;
• nitrous oxide;
• fluorinated gases.
CO2
is the most common greenhouse gas produced by human activities; it is
responsible for 63% of the warming of the planet caused by man. Its
concentration in the atmosphere is currently 40% higher than at the beginning
of industrialization.
Other
greenhouse gases are emitted in smaller quantities, but they retain heat much
more efficiently than CO2 and are up to 1000 times more powerful. Methane is
responsible for 19% of the global warming caused by man, while this proportion
is 6% for nitrous oxide.
The
causes of the increase in emissions
• Combustion of coal, oil and gas
produces carbon dioxide and nitrous oxide.
• The disappearance of forests
(deforestation). Trees help to regulate the climate by absorbing carbon dioxide
(CO2) from the atmosphere. So when they are slaughtered, this positive effect
is lost and the carbon stored in the trees is released into the atmosphere,
exacerbating the greenhouse effect.
• Increased livestock production.
Cattle and sheep produce large amounts of methane when digesting their food.
• Nitrogen-containing fertilizers
produce nitrous oxide emissions.
• Fluorinated gases have a
considerable warming effect, up to 23,000 times higher than CO2. Fortunately,
they are released in smaller quantities and are gradually banned by EU
regulations.
Global
warming
The
average temperature of the planet has increased by 0.85ºC compared to the end
of the 19th century. Each of the last three decades has been warmer than all
previous decades since the beginning of statistical surveys in 1850.
The
world's largest climatologists believe that human activities are most likely
the main cause of global warming since the mid-20th century.
They
consider that an increase of 2 ° C over the pre-industrial temperature is the
threshold beyond which the risk of attending dangerous or even catastrophic
climate changes is much higher. For this reason, the international community
has recognized the need to keep global warming below 2 ° C.
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