Environmental Science and Sustainability MCQs (Part-13)
What is the main purpose of ecosystems?
A To recycle waste
B To increase pollution
C To reduce biodiversity
D To provide habitats and resources
Ecosystems provide essential services by supporting life, including habitats for species, resources for food, and materials for shelter. They maintain balance in nature and regulate processes like climate and nutrient cycles.
What is the primary cause of climate change?
A Increased volcanic activity
B Greenhouse gas emissions from human activity
C Natural weather cycles
D Changes in the Sun’s energy
Climate change is primarily caused by the accumulation of greenhouse gases like carbon dioxide, methane, and nitrous oxide from activities such as burning fossil fuels and deforestation.
What is a key benefit of renewable energy?
A It reduces environmental pollution
B It increases carbon emissions
C It requires fossil fuels
D It depletes natural resources
Renewable energy sources such as wind, solar, and hydroelectric power produce little to no pollution compared to fossil fuels, helping to reduce greenhouse gas emissions and air quality degradation.
Which of the following is a form of waste recycling?
A Landfilling waste
B Using more plastic
C Reusing materials
D Burning trash
Waste recycling involves the collection and processing of used materials to make new products. This reduces waste sent to landfills, conserves natural resources, and lowers environmental pollution.
What is the effect of soil erosion?
A Enhanced biodiversity
B Loss of fertile topsoil
C Increased plant growth
D Improved water retention
Soil erosion occurs when wind or water removes the top layer of soil, which is rich in nutrients. This loss of fertile soil reduces agricultural productivity and disrupts ecosystems.
What is deforestation most commonly caused by?
A Urban expansion
B Renewable energy use
C Increased wildlife populations
D Ocean pollution
Urban expansion, including the construction of buildings and infrastructure, is a primary driver of deforestation. This leads to habitat loss, reduced biodiversity, and increased carbon emissions.
Which renewable energy source uses sunlight?
A Wind
B Solar
C Biomass
D Geothermal
Solar energy is a renewable energy source that harnesses the Sun’s power through solar panels. It is a clean and abundant energy source that produces no greenhouse gases during use.
What is the primary function of the ozone layer?
A To increase biodiversity
B To absorb harmful UV radiation
C To trap heat in the atmosphere
D To regulate rainfall
The ozone layer absorbs the majority of the Sun’s harmful ultraviolet (UV) radiation, protecting life on Earth from UV-induced health issues like skin cancer and cataracts.
What is the goal of sustainable development?
A To meet the needs of the present without compromising future generations
B To increase resource depletion
C To focus on short-term economic growth
D To increase population growth
Sustainable development aims to balance environmental, social, and economic needs in a way that ensures resources are available for future generations without over-exploiting them.
Which of the following contributes to groundwater contamination?
A Afforestation
B Industrial waste
C Rainwater harvesting
D Solar energy
Industrial waste, including chemicals, heavy metals, and petroleum products, can seep into the soil and contaminate groundwater, making it unsafe for drinking and irrigation.
What is a primary cause of water pollution?
A Wind erosion
B Excessive rainfall
C Natural rock formations
D Industrial discharges
Industrial discharges, such as toxic chemicals and waste, are major contributors to water pollution. These pollutants contaminate water bodies, harming aquatic life and making water unsafe for human use.
What does “carbon sequestration” help reduce?
A Noise pollution
B Soil erosion
C Carbon dioxide in the atmosphere
D Water usage
Carbon sequestration is the process of capturing and storing carbon dioxide from the atmosphere. It can be achieved through methods like planting trees or using technology to capture CO₂, reducing the impact of climate change.
What is the effect of hazardous waste on the environment?
A Pollutes water and soil
B Enhances biodiversity
C Increases air quality
D Improves soil health
Hazardous waste, including toxic chemicals and radioactive materials, can leak into the environment, contaminating water sources and soil. This poses risks to human health, wildlife, and ecosystems.
What is a characteristic of a green building?
A Increased pollution
B Use of sustainable materials
C High energy consumption
D Non-recyclable waste production
Green buildings incorporate sustainable materials, energy-efficient designs, and water-saving technologies. They aim to reduce environmental impact, enhance resource conservation, and provide healthier spaces for occupants.
What is the main focus of environmental ethics?
A Resource depletion
B Ignoring climate change
C Human impact on the environment
D Profit maximization
Environmental ethics is concerned with the moral relationship between humans and the environment. It emphasizes responsibility, sustainability, and the ethical treatment of ecosystems to protect the planet for future generations.