סוגיות בסביבה, קיימות ושמירת טבע - אנגלית

How many people on earth suffer from water availability and water sanitation issues?

1

שאלה #99746

		A few Billions
		About 100 Million
		Not many
		All answers are incorrect

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Greywater is typically defined as:

1

שאלה #99747

		Domestic wastewater
		Municipal wastewater excluding the wastewater stream from toilets
		Domestic wastewater excluding the wastewater stream from toilets
		Wash basin water

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Some health regulatory agencies object to on-site greywater reuse for toilet flushing:

1

שאלה #99748

		In order to protect citizens, as greywater reuse is often too expensive
		Because it often contains pathogens, thus may lead to the spread of diseases
		Because it may introduce pathogens to nearby water sources
		Agencies do promote greywater reuse in general, and for toilet flushing in particular, as it saves precious water

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Adi Iore 0 נקודות · יותר מ-6 חודשים

מוניטין: 60

מחלות מתדרדרות בריאות

Could the practice of reusing raw greywater for irrigation negatively impact irrigated soil?

1

שאלה #99749

		Yes, because the detergents in the greywater can enhance soil disinfection and reduce the number of pathogens
		No, because greywater is not contaminated as contaminated as domestic wastewater and thus no impact is expected
		Yes, because greywater often contains surfactants that might enhance water repellency in soils
		Yes, because greywater might form soil crusts due to its low surface tension, resulting from the presence of surfactants

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Nir Bibas 1 נקודות · יותר מ-6 חודשים

מוניטין: 28

בסוף השאלה ובסוף התשובה soil

Small onsite greywater treatment systems are often low tech-low costs units:

1

שאלה #99750

		Because such systems can produce sufficient water quality to meet high standards for unlimited irrigation by most.
		Because these systems are often simple to operate and can be used by many people
		Because many consider greywater as an effluent stream that does not pose high risks
		All answers are correct

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Potential advantage/s of reusing greywater is/are:

1

שאלה #99751

		National and personal economical savings
		Diminishing waste of freshwater
		Reusing nutrients
		All answers are correct

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'Total suspended solids' is:

1

שאלה #99752

		One measure to evaluate the level of water contamination
		Clogs sprinklers if its concentration is > 10 mg/L
		The solid fraction that passes through a 0.45 micron filter
		A lengthy analysis that can be substituted after calibration with analysis of electrical conductivity

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Salinity:

1

שאלה #99753

		Is significantly affected by organic matter as estimated by BOD analysis
		Is the sum of all ions expressed as mg/L and can often be estimated by a simple and quick measure of electrical conductivity
		Typically decreases in greywater after biological treatment
		In greywater is used to reduce the number of pathogens

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Adi Iore 1 נקודות · יותר מ-6 חודשים

מוניטין: 60

תשובה ושאלה מסתיימות בy

Most water on earth is:

1

שאלה #99754

		Stored in the form of ice
		Salty and found in the oceans
		Found as groundwater and is often quite difficult to extract
		Freshwater that is swiftly contaminated due to anthropogenic activity

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The Global freshwater crisis is a result of:

1

שאלה #99755

		Unequal distribution, growing demand and poor management of water resources
		The increase in water prices
		Receiving less rainfall due to global climate change
		Saline water intrusion and iceberg melting

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Carmel Keinar 0 נקודות · יותר מ-6 חודשים

מוניטין: 1

כל המשברים הם בגלל חלוקה לא הוגנת של משאבים (וגם התשובה הכי ארוכה כאן)

סוגיות בסביבה, קיימות ושמירת טבע - אנגלית

Discuss, Learn and be Happy דיון בשאלות

How many people on earth suffer from water availability and water sanitation issues?

Greywater is typically defined as:

Some health regulatory agencies object to on-site greywater reuse for toilet flushing:

Could the practice of reusing raw greywater for irrigation negatively impact irrigated soil?

Small onsite greywater treatment systems are often low tech-low costs units:

Potential advantage/s of reusing greywater is/are:

'Total suspended solids' is:

Salinity:

Most water on earth is:

The Global freshwater crisis is a result of:

בקשה לשינוי התשובה / תיקון שאלה gavel

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