International Green Warrior Olympiad Class 11 Previous Year Papers

Q.1

A city's wastewater treatment plant utilises a multi-stage process involving coagulation, sedimentation, filtration, and disinfection. The table below shows the average contaminant levels at different stages of the treatment process.
Analyse the data and answer the following questions:

A. Which stage of the treatment process removes the most turbidity?
B. Why the bacterial count drops significantly after disinfection.

Q.2

A community in an arid region has implemented a rainwater harvesting system to collect and store rainwater for various uses. The community relies heavily on this system as their primary source of water. However, due to climate change, the rainfall patterns have become unpredictable. The graph below shows the rainfall pattern over the past 8 years.
Which factor is most likely to limit the effectiveness of the rainwater harvesting system in this scenario?

A. Inadequate storage capacity hindering collection during periods of heavy rainfall
B. Minimising the environmental impact of excessive runoff during heavy rainfall periods.
C. Unpredictable collection amounts resulting in insufficient water supply during dry spells.
D. Contamination risks associated with pollutants present in the collected rainwater.

Q.3

In a biodiversity conservation project, two strategies were implemented to protect endangered species: Strategy A focused on captive breeding programs, while Strategy B emphasised habitat restoration and protection. Which strategy is more likely to result in the long-term conservation of endangered species?

Q.4

A small community in a remote, arid region is facing water scarcity. Their traditional farming practices are no longer sufficient to sustain the community's needs. To ensure long-term food security and water conservation, the community is considering adopting a new farming approach.

Which farming practice would be the most sustainable option for the community to adopt in the long term, considering both water conservation and food production?

Q.5

A large oil spill from a tanker accident devastates a coastal ecosystem. Oil slicks coat beaches and contaminate the water, impacting birds, fish, and other wildlife.
In addition to immediate cleanup efforts, what long-term environmental impacts should be monitored and addressed following this disaster?

1. The potential for oil residue to persist and enter the food chain
2. The disruption of coastal habitats and sensitive ecosystems
3. The economic and social impacts on fishing communities and tourism industries

Q.6

A school in an urban slum lacks proper sanitation facilities and clean water access. Students often skip school due to frequent stomach illnesses and infections.
Some effective interventions to improve the health and attendance of these students would be:

1. Providing free medical treatment for illnesses
2. Building clean and accessible toilets within the school premises
3. Distributing educational pamphlets on hygiene practices

Q.7

In a bustling metro city, a community aims to implement an effective waste management plan focusing on waste segregation, composting organic waste, and recycling. A company is assigned to execute this plan. However, the company proposes an incineration facility instead of the proposed methods, citing efficiency.

What is the most probable reason the new proposal of an incineration facility may not be suitable for the waste management plan?

Q.8

Consider the case study given below and answer the following question:

Case Study: Rejuvenating the Red Desert

The once fertile plains of the Red Desert now lie barren and parched. Decades of unsustainable agricultural practices, deforestation, and overgrazing have stripped the land of its topsoil, leaving behind a landscape of eroded gullies and windblown sand. The local community, dependent on the land for their livelihood, faces diminishing harvests and increasing dust storms.

The Challenge: Restoring the Red Desert requires a multi-faceted approach that addresses both the physical and social dimensions of land degradation. The key challenges include:

-Soil erosion and nutrient depletion: Restoring soil fertility is crucial for supporting plant growth.
-Water scarcity: The arid climate presents a significant challenge for plant growth. Implementing water harvesting systems like rainwater cisterns and promoting drought-resistant crops can optimise water use.
-Loss of biodiversity: Restoring native plant and animal populations is essential for creating a healthy and resilient ecosystem. This can involve assisted regeneration, seed dispersal, and creating wildlife corridors.
- Community engagement: Sustainable land management requires the active participation of the local community. Building trust, providing training, and ensuring equitable access to resources are crucial for long-term success.

The Outcome: Over time, the Red Desert undergoes a remarkable transformation. Eroded gullies are filled with fertile soil, native plants flourish, and animal populations return. The community experiences increased food security and improved livelihoods, thanks to sustainable farming practices and diversified income sources. The success of the program serves as a model for other communities facing land degradation, demonstrating the power of collaboration and knowledge-based solutions in restoring lost ecosystems and building a sustainable future.

Which of the following statement(s) describes the relationship between deforestation and soil erosion in the Red Desert?

1. Deforestation disrupts the water cycle, reducing rainfall and increasing soil dryness, indirectly leading to erosion.
2. Deforestation directly causes soil erosion by exposing soil to wind and rain.
3. Deforestation increases rainfall, leading to flash floods and soil washout.

Q.9

Your school has accumulated a large amount of outdated computers. You propose to the administration to donate the computers to a local school in need. This action demonstrates:

1. Disregarding the impact of outdated computers on environmental sustainability
2. The application of the concept of e-waste reuse.
3. The reduction of e-waste generation through extending the lifespan of electronic devices.

Q.10

You've decided to upgrade your home's insulation to improve energy efficiency. Which material is often used as an effective insulator in walls due to its low thermal conductivity?