You certainly would save some money, and in addition to that, according to some calculations done by Procter and Gamble, if all households in the US were to do the laundry in cold water, we would save the emissions of 32 metric tons of CO2 each year.
Certamente economizaríamos algum dinheiro e, além disso, segundo cálculos feitos pela Procter and Gamble, se todas as famílias nos EUA lavassem as roupas com água fria, economizaríamos 32 toneladas métricas de emissões de CO2 por ano.