Landfill waste results in air pollution as a. garbage decomposes and releases methane b. radon trapped in garbage is released c. paint and hairspray cans break down d. vandals set fire to flammable waste select the best answer from the choices provided

Answer : Option A) Garbage decomposes and releases methane.

Explanation : Landfills waste results in air pollution as the garbage which is decomposed as trash in the pit releases methane. Methane which is one of the major green house gases increases the global warming. Which contributes towards air pollution. Methane gas is very powerful gas which generates from the wastes decomposition and it rises the global temperature.

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.