Question

$\huge\mathrm{\pink{Question}}$
985.

$\huge\mathrm{\pink{Question}}$Marsh Gas?


${\tt{\red{\underline{\underline{\huge{Answer:}}}}}}$​

Answer 1

Step-by-step explanation:

The first human habitation in the Japanese archipelago has been traced to prehistoric times around 30,000 BC. The Jomon period, named after its cord-marked pottery, was followed by the Yayoi people in the first millennium BC when new inventions were introduced from Asia. During this period, the first known written reference to Japan was recorded in the Chinese Book of Han in the first century AD.

Around the 4th century B.C., the Yayoi people from the Korean Peninsula immigrated to the Japanese archipelago and introduced iron technology and agricultural civilization.[1] Because they had an agricultural civilization, the population of the Yayoi began to grow rapidly and replaced the Jōmon people, a native of the Japanese archipelago who were hunter-gatherers.[2]

Most modern Japanese

thanks for free points good morning

Answer 2

$\huge\star{\underline{\mathtt{\red{A}\pink{N}\green{S}\blue{W} \purple{E}\orange{R}}}}⋆$

Marsh gas, swamp gas, and bog gas is a mixture of methane, hydrogen sulfide, and carbon dioxide, produced naturally within some geographical marshes, swamps, and bogs.

The surface of marshes, swamps, and bogs is initially porous vegetation that rots to form a crust that prevents oxygen from reaching the organic material trapped below. That is the condition that allows anaerobic digestion and fermentation of any plant or animal material which incidentally also produces methane.

In some cases there is sufficient heat, fuel, and oxygen to allow spontaneous combustion and underground fires to smolder for some considerable time, as has occurred at a natural reserve in Spain. Such fires can cause surface subsidence, presenting an unpredictable physical hazard as well as environmental changes or damage to the local environment and the ecosystem it supports.