Explanation

Biogas is produced under anaerobic conditions; the process is denominated as anaerobic digestion.

The major constituent of biogas is methane (55-70%), CO2 (30-45%) and some traces of gases such as H2S and ammonia.

Explanation

Water gas is a mixture of Carbon Monoxide (CO) and Hydrogen (H2).

Water Gas is formed when steam is passed over red-hot coke.

Formula: H₂O

Boiling point: 100°C

Explanation

Methane is a chemical compound with the chemical formula CH4 (one carbon atom bonded to four hydrogen atoms).

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Explanation

A mature tree can absorb approximately 22 kilograms (or 48 pounds) of carbon dioxide from the atmosphere annually.

This is a remarkable process called carbon sequestration, where trees help remove CO2 from the atmosphere, storing carbon in their trunks, branches, roots, and soil.

Explanation

light blue litmus paper turning red under acidic conditions 

Red litmus paper turns blue under basic or alkaline conditions.

Purple litmus paper is neutral.

At pH levels of 0.0 to 4.5, the solution turns a red color;

At pH levels of 8.3 to 14.0, it turns a blue color.

Explanation

World War I was a global war originating in Europe

It lasted from 28 July 1914 to 11 November 1918.

Explanation

Over the first 20 years after entering the atmosphere, methane has more than 80 times the warming power of carbon dioxide.

Despite the fact that CO2 has a longer-lasting effect, methane accelerates warming in the short term.

Explanation

• Nitrogen (N2) makes up about 78% of the Earth's atmosphere.
• Making it the most abundant gas in the atmosphere.

Explanation

The world`s largest pink diamond mine, Argyle mine, has announced to shut down its operation after 40 years of business operation. The mine is based in Australia.

The world`s larges pink diamond mine, Argyle mine, in the remote Kimberley region of western Australia, has announced that it is shutting down its business, after 40 years of a successful operation.

Explanation

Nitrogen is the chemical element with the symbol N and atomic number 7. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.

Symbol: N

Atomic number: 7

Boiling point: -195.8 °C