Why is it commonly believed that carbon dioxide is responsible for global warming? 1.Carbon dioxide levels in the Earth’s atmosphere have been steadily decreasing.

2.Carbon dioxide has a longer average lifetime in the atmosphere.

3.The warming effect associated with carbon dioxide has remained unchanged.

4.Other greenhouse gases amplify the effect of carbon dioxide.

2. Carbon dioxide has a longer average lifetime in the atmosphere.

Explanation:

I do not personally believe carbon dioxide is the cause of warming as it takes up less than 1% of the atmosphere but I am giving you this answer because I have seen this question before and this is what the book deemed was the "correct" answer,

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.