What is the name of event caused by the 3200 Phaethon asteroid around 15 December of every year?
The most productive ecosystem in the biosphere is
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The tree species most commonly used in social forestry is
The 'solid waste' is also known as
Science dealing with study of soil is called
The outermost layer of sun is called
Ornithophily is effected by
A bomb explodes on the moon. You will hear its sound on earth after _________
The least preferred technique in the disposal of Municipal Solid Waste is