GATE Overflow for GATE ESE - Recent activity in Global and Regional Environmental Issues

Edited: GATE ES 2026 | Question: 22

Wed, 15 Apr 2026 09:52:56 +0000

Which of the following statements is/are TRUE about global warming?

Interception of incoming solar radiation by greenhouse gases in earth's atmosphere is responsible for global warming.
Interception of outgoing longwave radiation by greenhouse gases in earth's atmosphere is responsible for global warming.
Global warming can cause sea level rise.
Carbon dioxide is one of the major greenhouse gases in earth's atmosphere responsible for global warming.

Edited: GATE ES 2025 | Question: 54

Mon, 02 Jun 2025 20:06:30 +0000

An industry releases three greenhouse gases $\mathrm{(GHGs)}$, $\mathrm{CO}_{2}(5 \mathrm{~kg} /$ day $), \mathrm{CH}_{4}(0.5$ $\mathrm{kg} /$ day $)$, and $\mathrm{N}_{2} \mathrm{O}\left(0.1 \mathrm{~kg} /\right.$ day). The industry flares the $\mathrm{CH}_{4}$ before it is released to the atmosphere. The Global Warming Potential (GWP) are as follows: $\mathrm{CO}_{2}=1$, $\mathrm{CH}_{4}=21, \mathrm{~N}_{2} \mathrm{O}=310$. The annual GWP of GHGs released from the industry is $\_\_\_\_\_$ $\mathrm{kg} \mathrm{CO}_{2}$ equivalent. (rounded off to the nearest integer)

Edited: GATE ES 2025 | Question: 22

Mon, 02 Jun 2025 16:58:20 +0000

Choose the correct option(s) from the following regarding urban environment.

Urban canyons increase ventilation by trapping heat and thus enhancing urban heat island effect.
Program evaluation and review technique (PERT) is always used to estimate the economic impact of mitigation strategies for urban heat island effect.
In general, land surfaces in urban areas emit more long wave radiation compared to those in rural areas, and thus contribute to higher night time temperature.
Urban heat island can exacerbate urban flooding by intensifying rainfall intensity.

Recategorized: GATE ES 2024 | Question: 11

Mon, 21 Apr 2025 17:04:17 +0000

Which one of the following is NOT a greenhouse gas?

$\mathrm{CO}_{2}$
$\mathrm{CH}_{4}$
$\mathrm{H}_{2} \mathrm{~S}$
$\mathrm{H}_{2} \mathrm{O}$

Recategorized: GATE ES 2023 | Question: 14

Mon, 21 Apr 2025 17:00:56 +0000

The correct ascending order of the following greenhouse gases with respect to their global warming potential relative to $\mathrm{CO}_2$ in the time horizon of $100$ years is

$\mathrm{CH}_4<\mathrm{N}_2 \mathrm{O}<\mathrm{CFCl}_3<\mathrm{CF}_2 \mathrm{Cl}_2$
$\mathrm{CF}_2 \mathrm{Cl}_2<\mathrm{CH}_4<\mathrm{N}_2 \mathrm{O}<\mathrm{CFCl}_3$
$\mathrm{CH}_4<\mathrm{N}_2 \mathrm{O}<\mathrm{CF}_2 \mathrm{Cl}_2<\mathrm{CFCl}_3$
$\mathrm{N}_2 \mathrm{O}<\mathrm{CFCl}_3<\mathrm{CH}_4<\mathrm{CF}_2 \mathrm{Cl}_2$

Recategorized: GATE ES 2023 | Question: 34

Mon, 21 Apr 2025 16:59:58 +0000

Which of the following statements is/are NOT true?

Urban heat island effect in a city can be reduced by increasing trees and vegetation cover in the city.
Urban heat island intensity is affected by PM 2.5 concentrations in a city.
Urban heat island intensity increases due to installation of reflective roofs in a city.
In comparison with the non-urban areas, urban heat island effect raises night-time temperatures more than daytime temperatures in cities.

Recategorized: GATE ES 2022 | Question: 15

Mon, 21 Apr 2025 16:47:18 +0000

Which one of the following statements is correct regarding Global warming?

Water vapour does not contribute to global warming.
Global warming is likely to increase the productivity of plants due to $\mathrm{CO}_{2}$ fertilization.
CFCs do not cause global warming, but can cause ozone layer depletion in stratosphere.
HFCs and HCFCs are good substitutes for the ozone depleting substances as they cause neither global warming nor ozone layer depletion.

Recategorized: GATE ES 2021 | Question: 40

Mon, 21 Apr 2025 15:40:55 +0000

For any particular location, which of the following would influence the solar radiation incident on a rooftop solar water heater?

Heater surface temperature
Day of the year
Hot water temperature
Sky clearness