Which of these actions a sustainable practice? a. expanding the amount of fossil fuels extracted b. setting usage limits on a resource c. overconsuming a resource d. exceeding fossil fuel emissions targets

A sustainable practice is B. Setting usage limits on a resource

Sustainable practices are those that aim to reach an equilibrium between the use of natural resources for human development, and the preservation of the environment for future generations.

Setting usage limits on a resource is a sustainable practice because it allows for taking advantage of the resource, while providing constraints to its use, forcing the industry to be creative and develop alternative methods that take better advantage of that resource, or that use different resources (e.g. limiting fossil fuel emissions, forcing the industry to find alternative ways to generate power like solar energy).

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the atomic mass is the bottom number on the element.

-steel jelly

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.