Which of the following is not a method for addressing soil contamination? a. excavate and dispose of the soil. b. use microbes to digest the contaminants. c. use heat to force the contaminants into the gas phase and out of the soil. d. none of the above

The correct answer is D. None of the above

Explanation:

Soil contamination occurs as the soil is altered by non-natural substances or agents such as chemicals, metals, pesticides or waste. This usually has a negative effect on ecosystems and might represent a risk for health and life. In terms of approaches to address, reduce or eliminate soil contamination, methods that are commonly used include excavating and removing the soil that has been contaminated, extracting contaminants through heat making them become a gas, and using plants, fungus, microbes or other organisms to remove and diggest specific contaminants.

This means, all of the options given are methods for addressing soil contamination and thus, the correct answer is none of the above because all of these methods are a way of addressing soil contamination.

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water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.