I believe it is <span>Detergents </span>
Yes. Greenhouse gasses make it hard for heat to leave the atmosphere, but also hard for heat to enter the atmosphere. So once the heat is gone, it will be hard for earth to warm up again, thus causing an ice age
Comparative and experimental investigations are two of three scientific investigations, the other is descriptive investigations.
--hope this helps--
It could be either Carbon has 4 valence electrons and can form many other molecules, or that it has the ability to form a variety of single, double and triple bonds. Both are true and both show complexity of organic compounds.
