The antonyms for the word "wastages" are conservation, preservation, and saving. These words denote the act of managing resources efficiently and avoiding unnecessary loss or damage. Conservation emphasizes the sustainable use of resources, such as energy or water, to ensure their availability for future generations. Preservation refers to protecting natural habitats, historical sites, and cultural artifacts from destruction or decay. Saving implies the frugal and judicious use of resources, often to achieve financial or environmental benefits. By practicing conservation, preservation, and saving, individuals and organizations can reduce their ecological footprint, improve resource efficiency, and promote sustainable development.