Question

A gas produced by paddy field and concerned with global warming is:
A. $CO_2$
B. $Cl_3$
C. $H_2S$
D. $CH_4$

Answer 1

Hint: A paddy field is a flooded field of arable land, most notably rice and taro, used for growing semi-aquatic crops. As terraces and adjacent to depressed or steeply sloped features such as rivers or marshes, fields may be built into steep hillsides. To produce and need large amounts of water for irrigation, they will require a lot of labour and materials.

Complete answer:
A major issue nowadays is global warming. One of the vital greenhouse gases contributing to global warming is $CH_4$. Approximately 60 percent of global $CH_4$ emissions are attributed to anthropogenic activities. The oil and gas industry, irrigation, landfills, wastewater disposal, and pollution from coal mines are the major sources of anthropogenic $CH_4$ emissions.

Globally, some 530 million tonnes of $CH_4$ (carbon-converted) are released annually. Rice fields lead to global warming, but this is a much broader problem than previously believed. As a major source of $CH_4$ pollution, the typical paddy field with continuous flood irrigation is known.

A paddy field contributes 100 g of $CH_4$ to the atmosphere during the production of 1 kg of rice grain.

The paddy field's microbes breathe and release carbon dioxide. The growth of carbon dioxide raises the surrounding temperature. This results in more in the emission of methane. In tandem with carbon dioxide, methane is becoming a strong greenhouse gas. Sun radiation is trapped by them, stopping them from bouncing out and landing to the surface of the earth.

Hence, the correct answer is option (D)

Note: Due to global warming the Arctic ice is quickly melting. It is anticipated that the area will have a fully ice-free summer by 2040 or even earlier.
Owing to the loss of forests, ecosystems and acidic seas, all caused by global warming, more than 1 million animals have become extinct.