While the wealth effect from a capital influx would induce households to buy more dirty fuel, they might simultaneously reduce their purchases depending on the degree of substitutability with clean fuels and other consumption. This substitution effect will not necessarily dominate the wealth effect, unless dirty fuels are an inferior good. However, a capital increase could also cause labor to b...

In this study we report the underlying reasons to why bacteria are present on banknotes and coins. (...) We treated the various currencies used in this study as microcosms, and the bacterial loading from human hands as the corresponding microbiome. We show that the substrate from which banknotes are produced have a significant influence on both the survival and adherence of bacteria to banknote...