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Dear
Pandit ji,
Can you tell me the amount of Carbon dioxide exhaled by people in
each breath? Please give me the details.
M P Yadav
Via e-mail
Dear M P Yadav ji,
A person at rest inhales and exhales about 500 ml of air
with each breath (Biology by Claude A. Villee). This air consists of
150 ml of recently inhaled air that is in the larger air passages
and 350 ml of air that has been in the alveoli of the lungs. The
recently inhaled air (or atmospheric air) has approximately 0.04%
carbon dioxide by volume, and the alveolar air has approximately
5.3% carbon dioxide by volume. Thus, the average carbon dioxide
content of the 500 ml of exhaled air is:
[(150 ml)/(500 ml) x 0.04% CO 2 ] + [(350 ml)/(500 ml) x 5.3% CO 2 ]
= 3.7% CO 2 by volume, or 5.7% CO 2 by weight.
Dear Pandit ji,
Can you please explain 'eco villages' mentioned in the EEK term
Ecofeminism?
Abdullah
Via e-mail
Dear Abdullah ji,
Eco-villages are small villages of 100 to 140 people. In both
the traditional and modern feminist ideal of such villages, women
function as the only landlords or the only landowners. Property can
be inherited only maternally or in a matriarchy. These eco-villages,
according to studies in anthropology, historically formed the most
stable and prevalent type of human society. Ecofeminism advocates
moving back to eco-villages because it emphasises the experience of
domination and exploitation shared by women and the natural world.
However, because of the fineline distinguishing real and imagined
historical village societies, ecofeminist ideals and pagan
practices, eco-villages are sometimes seen as a form of primitivism.
But many feminists see a substantial role for modern technologies
(including those invented by men, whom they would welcome as
inventors, engineers, traders, and also sperm contributors) in the
creation and operation of such villages.
Dear
Pandit ji,
I am Preethi, a class tenth student. I am eager to know
about biogas as our country is now facing serious energy crisis. I
believe that biogas plants are most suitable to generate power and
they does not cause any harm. I know that there are two types of
biogas plants: Fixed dome type and Floating gas-holder type. Can you
please explain them to me?
Jovitha Preethi
Kerala
Dear Preethi ji,
You are right. These are the two types of bio gas plants
are used in India. Slurry is made from cattle dung and water, which
is the starting material for the plants.
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