48 How does one know that the earth is breathing?
(A) Because satellite images show no change in the green areas.
(B) Because satellite images show that the plants’ breathing activities happen underwater.
(C) Because satellite images show that plants are absorbing CO2 and producing oxygen.
(D) Because satellite images show overuse of fossil fuels.

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統計： A(19), B(60), C(233), D(19), E(0) #1150932

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This is the earth br...
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These satellite衛星 images show the ebb and flow漲落起伏 of plant life on earth over three years, taken by a NASA satellite called SeaWiFS.
The blue areas are void無效 of plants, the red spots indicate表明 an overabundance過多, and the green areas show where plants are thriving興旺.
This is the earth breathing.
The plants are taking up CO2, and they’re breathing out oxygen氧氣.
As suggested by oceanographers海洋学者, almost half of that activity is going on underwater.
The oceans are teeming充滿 with tiny microscopic極小 plants植物 called phytoplankton浮游植物.
They are at the bottom底部 of the food chain一連串, and they basically feed all sea life.
Like all plants, phytoplankton浮游植物 absorbs CO2 from the atmosphere. 
    These images show that phytoplankton boomed over the last three years.
That’s one of the key benefits of these satellite衛星 images.
Over time, scientists will use them to help predict預言 how plants might respond as we burn more fossil fuels化石燃料, and as global CO2 levels rise.
Many scientists think such greenhouse gasses will cause global warming.
They suggest that it is related to recent climate change.
However, what they don’t know is how life in the ocean will respond over the long haul if CO2 levels keep rising.
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