CURRENT AFFAIRS

2017

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
World’s first "negative emissions" plant that turns carbon dioxide into carbonate rocks (stone) has begun operations in
A
Iceland
B
Scotland
C
Greenland
D
Finland
Explanation: 

Detailed explanation-1: -Reykjavik Energy’s geothermal power plant in Hellisheidi, Iceland. Instead of using reversible absorption, CarbFix uses Iceland’s plentiful natural resources to capture carbon dioxide. Every time you open a can of soda, you are drinking dissolved CO2 in water. The Hellisheidi plant works on a similar principle.

Detailed explanation-2: -The CO2 is dissolved in water, the same way a soda machine makes sparkling water (Figure 1). The water with the dissolved CO2 is then pumped deep into the ground. If this sparkling water is pumped into the right kinds of rocks, the rocks release metals that mix with the CO2 in the water and turn the CO2 into stone.

Detailed explanation-3: -The Petra Nova facility in Texas was shut down in 2020 due to plunging oil prices. Its restart gives a new lease of life for a project that critics saw as one of the industry’s highest-profile failures.

Detailed explanation-4: -The new “mammoth” plant will contain around 80 large blocks of fans and filters that suck in air and extract its CO2, which Icelandic carbon storage firm Carbfix then mixes with water and injects underground-where a chemical reaction turns it to rock. The process will be powered by a nearby geothermal energy plant.

Detailed explanation-5: -The live oak is the most efficient carbon capturing tree, it being able to sequester some 10, 994 CO2 equivalent over its lifetime. Ranking second is the East Palatka holly, with a lifelong carbon fixation of 7, 321 CO2 equivalent.

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