What is the main cause of temperature rise in the interior of the Earth?
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What is the sound made by seal called?
What is the process of waste water treatment is commonly known?
What are Equinox days?
Which of the following planets has the highest average density?
Tamarindus indica is the scientific name of ________.
The salt concentration (measured as salinity in parts per thousand), is less than ______ % in inland waters.
Thermal electricity is generated by using which of these ?