فقرة برزنتيشن
بحث موضوع ملخص جاهز باللغة الانجليزية انشاء
موضوع انجليزي عن ابدا قصير كيفية كتابة موضوع تعبير باللغة الانجليزية توجيهي قواعد
كتابة تعبير بالانجليزي طريقة سهلة لكتابة
تعبير بالانجليزي موضوع تعبير انجليزي يصلح لكل المواضيع كتابة تعبير بالانجليزي عن
نفسك وصف تعبير انجليزي يصلح لكل المواضيع موضوع انشاء شامل لكل المواضيع موضوع يصلح
لجميع المواضيع موضوع تعبير انجليزي جاهز برجراف ينفع لاى موضوع موضوع انجليزي عن الماء تعبير عن الماء بالانجليزي
قصير وسهل فوائد الماء بالانجليزي قصير بحث عن الماء عبارات بالانجليزي
طويل فوائد الماء للجسم قصير وسهل بحث انجليزي
عن تلوث الماء فوائد شرب الماء بالانجليزي
اهمية الماء بالانجليزي مترجم تعبير عن الماء بالانجليزي ثالث ثانوي برزنتيشن عن الماء
بالانجليزي برزنتيشن عن الماء بالانجليزي قصير
An
indispensable natural resource: water
Water
is the essential component of all living things and of man in particular. It
is, moreover, an essential resource for most of its activities.
Water
covers three quarters of the Earth's surface, but only a small part is
available and man-made. In addition, water resources that can be used by humans
are now threatened with scarcity and exposed to multiple pollutions. It is
therefore essential to preserve and manage this indispensable natural resource
in the long term.
1.
How is water essential for humans?
•
Water is an essential element to any form of life: it moisturizes and conveys
the essential elements for cellular activities. An adult man is thus made up of
65% of water, which he has to constantly renew to compensate for daily losses
due to perspiration, urine, etc.
•
In addition, man uses water for domestic purposes, for his agricultural
activities, including irrigation, and for most of his industrial activities.
2.
What water resources can be used by humans?
•
On the surface of the Earth, water is distributed in different reservoirs.
Saltwater from the oceans and seas accounts for over 97% of the water on the
Earth's surface, freshwater less than 3%. The majority of this freshwater is
trapped as ice in ice caps and glaciers. On the continents, liquid freshwater
is found in lakes, rivers and groundwater. Finally, water is present in very
small quantities, in the form of water vapor, in the atmosphere and the
biosphere.
•
Water covers three-quarters of the planet's surface. However, the only reserve
that is truly available and manageable is fresh water from rivers and
groundwater. This stock represents only one hundredth of the total volume of
fresh water. However, depending on the climate, geological structure, demography,
etc., this resource is more or less available and easy to access.
