With reference to the disposal of garbage in landfills, consider the following statements: 1. A landfill is an open low-lying area used to dump both useful and non-useful components of garbage without separation. 2. Once full, a landfill is immediately used for agricultural purposes. 3. Landfill sites are often converted into parks or playgrounds after closure. Which of the statements given above is/are correct?

Correct Option The correct option is (c) 1 and 3 only. Explanation Landfilling is a method of solid waste disposal in which refuse is buried between layers of earth. It is typically used for the final disposal of non-biodegradable and non-recyclable waste (the non-useful component) in low-lying areas. Statement-wise Analysis - Statement 1 is Correct: A landfill is generally defined as a low-lying open area where garbage collected from a city or town is dumped. While sustainable waste management mandates the segregation of waste (separating recyclables and biodegradables) before disposal, in many conventional descriptions and practical scenarios (such as open dumps), mixed garbage containing both useful and non-useful components is brought to these sites. In the context of this question, the definition aligns with the general practice of depositing municipal waste in such areas. - Statement 2 is Incorrect: A landfill cannot be used for agricultural purposes or building construction immediately after it is full. The decomposing waste generates gases (such as methane) and leachates, and the soil remains loose and unstable. It typically takes at least 20 years for the site to stabilize sufficiently for any construction. Agriculture is also avoided due to potential soil toxicity. - Statement 3 is Correct: After a landfill site is completely filled, it is usually covered with a layer of soil and converted into a park or a playground. For example, the Indraprastha Park in New Delhi is built on a landfill site. This is the standard method for the rehabilitation of closed landfill sites. Key Takeaway Landfills are sites for the disposal of the non-useful component of solid waste. Once filled, they are rehabilitated into recreational areas (parks) but are not suitable for construction or agriculture for several decades due to instability and gas emissions.

NCERT Class 6 Environment & Ecology — Chapter 3: Garbage in, garbage out

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With reference to the disposal of garbage in landfills, consider the following statements:

A landfill is an open low-lying area used to dump both useful and non-useful components of garbage without separation.
Once full, a landfill is immediately used for agricultural purposes.
Landfill sites are often converted into parks or playgrounds after closure.

Which of the statements given above is/are correct?

Official previous-year question

Verified 1 Aug 2026.

Options

A1 and 2 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is (c) 1 and 3 only.

Explanation

Landfilling is a method of solid waste disposal in which refuse is buried between layers of earth. It is typically used for the final disposal of non-biodegradable and non-recyclable waste (the non-useful component) in low-lying areas.

Statement-wise Analysis

Statement 1 is Correct: A landfill is generally defined as a low-lying open area where garbage collected from a city or town is dumped. While sustainable waste management mandates the segregation of waste (separating recyclables and biodegradables) before disposal, in many conventional descriptions and practical scenarios (such as open dumps), mixed garbage containing both useful and non-useful components is brought to these sites. In the context of this question, the definition aligns with the general practice of depositing municipal waste in such areas.
Statement 2 is Incorrect: A landfill cannot be used for agricultural purposes or building construction immediately after it is full. The decomposing waste generates gases (such as methane) and leachates, and the soil remains loose and unstable. It typically takes at least 20 years for the site to stabilize sufficiently for any construction. Agriculture is also avoided due to potential soil toxicity.
Statement 3 is Correct: After a landfill site is completely filled, it is usually covered with a layer of soil and converted into a park or a playground. For example, the Indraprastha Park in New Delhi is built on a landfill site. This is the standard method for the rehabilitation of closed landfill sites.

Key Takeaway

Landfills are sites for the disposal of the non-useful component of solid waste. Once filled, they are rehabilitated into recreational areas (parks) but are not suitable for construction or agriculture for several decades due to instability and gas emissions.

Your note

More from Chapter 3: Garbage in, garbage out

Consider the following statements regarding the burning of agricultural waste: 1. Burning dried leaves releases oxygen into the atmosphere. 2. Composting converts these wastes into useful manure. 3. These wastes can be converted into useful compost instead of being burnt. Which of the statements given above is/are correct?

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With reference to 'Vermicomposting', consider the following statements: 1. It is a method of preparing compost with the help of redworms. 2. Redworms are a type of chemical agent used to decompose waste. 3. This method requires the addition of chemical fertilizers to accelerate decomposition. Which of the statements given above is/are correct?

easy

Which environmental conditions are most conducive to the survival of redworms in a vermicomposting pit?

medium

Consider the following materials: 1. Vegetable peels 2. Coffee and tea remains 3. Pickles and vinegar 4. Milk preparations Which of the materials given above should NOT be added as food for redworms in a vermicomposting pit?

medium

In the anatomical organisation of a redworm, the structure known as the gizzard is primarily involved in which of the following functions?

easy

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Correct Option

The correct option is (c) 1 and 3 only.

Explanation

Statement-wise Analysis

Statement 1 is Correct: A landfill is generally defined as a low-lying open area where garbage collected from a city or town is dumped. While sustainable waste management mandates the segregation of waste (separating recyclables and biodegradables) before disposal, in many conventional descriptions and practical scenarios (such as open dumps), mixed garbage containing both useful and non-useful components is brought to these sites. In the context of this question, the definition aligns with the general practice of depositing municipal waste in such areas.
Statement 2 is Incorrect: A landfill cannot be used for agricultural purposes or building construction immediately after it is full. The decomposing waste generates gases (such as methane) and leachates, and the soil remains loose and unstable. It typically takes at least 20 years for the site to stabilize sufficiently for any construction. Agriculture is also avoided due to potential soil toxicity.
Statement 3 is Correct: After a landfill site is completely filled, it is usually covered with a layer of soil and converted into a park or a playground. For example, the Indraprastha Park in New Delhi is built on a landfill site. This is the standard method for the rehabilitation of closed landfill sites.

Key Takeaway