Which of the four ways of using land below is least likely to cause envirmental harm

Explanation:

Affect peak flow and water volume, will heighten erosion potential and affect habitat and water quality. Increase storm water runoff, which can deliver more pollutants to water bodies that residents may rely on for drinking and recreation. To avoid all this Controlling the use of plastic bags will help to keep our surroundings clean. One should use recycled and eco-friendly products such as paper or jute bags instead of plastic bags. Throwing of plastic bags by the roadside only makes our surroundings dirty and unhygienic.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.