But water can only evaporate if the air around it can absorb more water. If the air is already saturated with moisture, perspiration will not evaporate. Furfural and water evaporate together from the reaction mixture, and separate upon condensation. Steps are taken to ensure that volatile solvents do not evaporate. Unlike chlorine or bromine, metals and minerals do not evaporate, and do not degrade. The oil was burned to evaporate brine and produce salt. In an enclosed environment, a liquid will evaporate until the surrounding air is saturated. With less hair, sweat could evaporate more easily and cool the bodies of humans faster. In water, it can evaporate easily and is fairly insoluble. They will slowly evaporate via Hawking radiation. This is in contrast to dehydration by most conventional methods that evaporate water using heat. The drier and less humid the air is, the faster the water will evaporate. The inflowing water would then evaporate quickly because of the desert climate. Both are volatiles, so engine residues simply evaporate. The BBC reported experts said the nerve agent does not evaporate or disappear over time.