MCQs 2026

Thermokarst is a landscape characterized by irregular surfaces of marshy hollows and small hummocks formed as ice-rich permafrost thaws.

Thawing permafrost can release ancient microorganisms that have been frozen for thousands of years, posing potential risks to ecosystems and human health.

A positive feedback loop in this context means that the initial warming leads to processes (permafrost thaw and greenhouse gas release) that amplify the warming itself.

The decomposition of organic matter in thawing permafrost releases significant amounts of carbon dioxide (CO2) and methane (CH4), both potent greenhouse gases.

Permafrost refers to ground that has been frozen for at least two consecutive years, commonly found in Arctic and sub-Arctic regions.

The Ministry of New and Renewable Energy (MNRE) plays a central role in the implementation and facilitation of the National Green Hydrogen Mission.

A key objective of the mission is to position India as a leading global producer and exporter of green hydrogen.

The high capital cost of electrolyzers and the need for extensive renewable energy infrastructure are significant hurdles to the cost-competitiveness and large-scale deployment of green hydrogen.

The National Green Hydrogen Mission was officially launched by the Indian government in January 2023.

Green hydrogen is produced by splitting water molecules into hydrogen and oxygen using electrolysis, with the electricity for this process sourced from renewable energy sources like solar and wind.