Question

WRITE 2 WAYS BY WHICH CARBONDIOXIDE IS FIXED IN THE ATMOSPHERE?​

Answer 1

HEY MATE 【◆◆◆◆◆】【●●●●●】---------

The increasing carbon dioxide concentration in our atmosphere is causing enhanced greenhouse effect, thus resulting in global warming. A number of steps are being currently taken or have been proposed to tackle this problem. One of the key steps is to decrease our dependence on fossil fuels (such as, coal, natural gas, petroleum, etc.). These compounds fulfill most of our energy requirements, in the form of electricity, heating and are also primary transportation fuels. The enormous amounts of carbon dioxide (and other greenhouse gases) released by their combustion can be reduced by adopting renewable energy sources and increasing the efficiency of fossil fuel combustion and energy transmission. These methods are aimed at reducing carbon dioxide generation. Carbon sequestration is a method aimed at removing the carbon dioxide (already generated) from our atmosphere. Carbon dioxide can be sequestered in underground reservoirs (such as old mine shafts, etc.) or undersea (deep sea burial). A known and commonly used method, afforestation, can also be employed for removing the carbon dioxide from our atmosphere.

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Answer 2

Carbon dioxide is fixed in the atmosphere in two ways :-

• Green plants convert carbon dioxide into glucose in the presence of sunlight.
• Many marine animals such as unio, mussels, clams, urchins and pila use carbonates dissolved in sea water to make their shells.

This fixation of carbon dioxide keeps its percentage almost constant in the atmosphere.

The atmosphere contain 78 % nitrogen, 21 % oxygen and 1 % other gases which include 0.04 % of carbon dioxide.