Questions

Forest habitat and soil are conserved through selective logging, in which only some trees in an area of forest are cut.

Potentially hazardous foods are foods that might contain food poisoning bacteria and are capable of supporting growth of these bacteria or formation of toxins to levels that are unsafe for consumers, if the foods are not stored at correct temperatures. Toxins are poisonous chemicals produced by some types of bacteria.

The food can be left at room temperature until it reaches 60 deg C because food-poisoning bacteria will not multiply at 60 deg C or above. However, do not leave food cooling at room temperature unless you are sure that the temperature of the food is still at least above 60 C.

A Unicode character requires between one and four bytes of storage, depending on the encoding format used. Hence, a character requires one byte of storage.

The energy in most ecosystems comes from sun light.

The difference between Greenwich Mean Time & Indian Standard Time is 5 1/2 hours.

The Stoic School taught that man should accept his fate, since he cannot change it. According to Stoics, serenity of mind is the goal all men should strive to attain.Epicureans believed that the highest good for man is pleasure ,but they aimed at tranquility of mind rather than indulgence in pleasures.

The difference between Union and Union all is that Union all will not eliminate duplicate rows, instead it just pulls all rows from all tables fitting your query specifics and combines them into a table. A UNION statement effectively does a SELECT DISTINCT on the results set.