MCQs 2026

When organic matter in permafrost thaws, it decomposes, releasing significant amounts of carbon dioxide (CO2) and methane (CH4), both potent greenhouse gases.

Permafrost refers to ground that has been frozen continuously for at least two years. It is a significant feature of Arctic landscapes.

The Amazon is renowned for its exceptional biodiversity, housing an estimated 10% of all known species on Earth.

The low river levels disrupt transportation, fishing, and access to resources for communities living along the Amazon River and its tributaries, leading to humanitarian challenges.

The drought causes widespread tree mortality and increases the risk of fires, leading to the release of stored carbon into the atmosphere, thus turning the Amazon into a net carbon emitter.

The current drought is attributed to a combination of factors, including rising global temperatures and the influence of El Niño, which disrupts normal rainfall patterns in the region.

The Amazon acts as a massive carbon sink, absorbing vast quantities of CO2 from the atmosphere, which is vital for mitigating climate change. While it produces oxygen, its role as a carbon sink is more critical for climate regulation.

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

The mission is projected to boost the economy by creating numerous employment opportunities and reducing the import bill for fossil fuels, thereby improving the trade balance.

The mission prioritizes the use of green hydrogen in hard-to-abate sectors like petroleum refining, fertilizer production, and steel manufacturing, where decarbonization is challenging.