Explanation

• Industrial growth requires more machinery, production, and transport.
• All these processes need more energy to operate.
• Therefore, increased industrial activity directly leads to higher energy consumption.
• Most industries rely on fossil fuels and electricity.

Last verified on 06-05-2026

Explanation

• Natural gas burns more cleanly than other fossil fuels.
• It produces less carbon dioxide (CO₂) and fewer pollutants.
• This makes it more environmentally friendly compared to coal and oil.
• Main component of natural gas is methane (CH₄).
• It is widely used for cooking, heating, and electricity generation.

Last verified on 06-05-2026

Explanation

• Renewable energy sources are naturally replenished over time.
• They do not run out quickly and can be used repeatedly.
• It is environment-friendly and reduces pollution.
• In contrast, non-renewable sources have limited supply and take millions of years to form.
• Non-renewable sources like coal and oil are finite and exhaustible.

Last verified on 06-05-2026

Explanation

• A wind speed of 10–14 km/h (approximately 6–9 mph or 5–8 knots)
• Classified as a Gentle Breeze (Force 3) to a light breeze (Force 2)

Last updated question by NS on 2 MAY 2026

Explanation

• Ozone (O₃) is both beneficial and harmful depending on its location.
• In the Ozone Layer, it protects life by blocking UV rays.
• At ground level, it becomes a pollutant harmful to lungs and plants.
• Thus, it has a dual role in Earth’s atmosphere.

Last verified on 02-05-2026

Explanation

• The ozone hole is mainly caused by chlorofluorocarbons (CFCs).
• CFCs release chlorine atoms that destroy ozone molecules.
• This happens in the Ozone Layer.
• Major impact observed over Antarctica.
• Linked to human activities like refrigeration and aerosols.

Last verified on 02-05-2026

Explanation

• The lithosphere is the rigid outer layer of the Earth.
• It includes the crust and uppermost solid mantle.
• It is broken into tectonic plates.
• These plates move slowly over the softer layer below.

Last verified on 02-05-2026

Explanation

• The stratosphere is heated mainly by ozone.
• Ozone layer absorbs harmful ultraviolet (UV) radiation from the Sun.
• This absorption converts solar energy into heat.
• It causes warming in the stratosphere instead of cooling.
• This layer protects Earth from dangerous UV rays.

Last verified on 01-05-2026

Explanation

• Climate change is mainly affected by energy use and environmental policies.
• Non-renewable energy (coal, oil, gas) increases carbon emissions, so it does not positively contribute.
• Afforestation helps reduce CO₂ and improves climate.
• Emission Trading System encourages reduction of emissions.
• Therefore, non-renewable energy is harmful for climate balance.

Last verified on 01-05-2026

Explanation

Composition of Air:

• Nitrogen → 78%
• Oxygen → 20.95%
• Argon → 0.93%
• Carbon dioxide → 0.04%
• Other gases → very small traces

Last verified on 30-04-2026