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A “biological annihilation” of wildlife in recent decades means a sixth mass extinction in Earth’s history is under way and is more severe than previously feared, according to research. Scientists analysed both common and rare species and found billions of regional or local populations have been lost. They blame human overpopulation and over consumption for the crisis and warn that it threatens the survival of human civilization, with just a short window of time in which to act.
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Answer:
11
Explanation:
coz, there occurs gas phase transformation
Answer:
Soda-acid fire extinguishers contain sodium bicarbonate and sulphuric acid. It is the most effective house-hold fire extinguisher and it consists of a strong iron vessel .The sulphuric acid reacts with sodium bicarbonate to form sodium sulphate, water and carbon dioxide.
Explanation:
