What is common to the species shown in figures $\mathrm{A}$ and $\mathrm{B}$ ?
Both are invasive weed species.
If we remove half of the forest cover of earth, the crisis that will occur
Exotic species Eichhornia crassipes
Some of the nutrient cycles are labelled as below
$I$.Sulphur cycle $II$.Phosphorus cycle
$III$. Carbon cycle $IV$ .Nitrogen cycle
Of these, the sedimentary cycle is represented by
World Summit on Sustainable Development $(2002)$ was held in
Silent valley is tropical evergreen forest located in
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