<P> Greywater systems function in sequestering used indoor water, such as laundry, bath and sink water, and filtering it for reuse . Greywater can be reused in irrigation and toilet flushing . There are two types of greywater systems: gravity fed manual systems and package systems . The manual systems do not require electricity but may require a larger yard space . The package systems require electricity but are self - contained and can be installed indoors . </P> <P> As populations and resource demands climb, waste production contributes to emissions of carbon dioxide, leaching of hazardous materials into the soil and waterways, and methane emissions . In America alone, over the course of a decade, 500 trillion pounds of American resources will have been transformed into nonproductive wastes and gases . Thus, a crucial component of sustainable living is being waste conscious . One can do this by reducing waste, reusing commodities, and recycling . </P> <P> There are a number of ways to reduce waste in sustainable living . Two methods to reduce paper waste are canceling junk mail like credit card and insurance offers and direct mail marketing and changing monthly paper statements to paperless emails . Junk mail alone accounted for 1.72 million tons of landfill waste in 2009 . Another method to reduce waste is to buy in bulk, reducing packaging materials . Preventing food waste can limit the amount of organic waste sent to landfills producing the powerful greenhouse gas methane . Another example of waste reduction involves being cognizant of purchasing excessive amounts when buying materials with limited use like cans of paint . Non-hazardous or less hazardous alternatives can also limit the toxicity of waste . </P> <P> By reusing materials, one lives more sustainably by not contributing to the addition of waste to landfills . Reusing saves natural resources by decreasing the necessity of raw material extraction . For example, reusable bags can reduce the amount of waste created by grocery shopping eliminating the need to create and ship plastic bags and the need to manage their disposal and recycling or polluting effects . </P>

Which of the following describes an example of living sustainably