Amount of nitrogen fixed electrochemically and photochemically is
$140 $ $mg/$$m^2$$/yr$
$78$ $mg/$$m^2$$/yr$
$35$ $mg/$$m^2$$/yr$
$15$ $mg/$$m^2$$/yr$
It’s obvious.
According to Robert Constanza average price tag for ecosystem services is
Which one of the following ecosystems is more productive in terms of carbon dioxide fixation
Fishing and Guano birds assist the cycling of
An individual transitional communities in ecological succession are termed as
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