By telling your community how to protect themselves in their enviroment
D,it never acceptable to ignore rules or etiquette but A, when no one else notices you ignored the rules.
i'm unsure of your statement, but i believe that the statement is false. A rake would add more physical activity, since you're using both leg muscles while walking, and arm muscles.
Industry would have unlimited ability to produce chemicals for use as pesticides, additives, etc without being required to measure their effects on people or their accumulation in water or soils and their impact on the environment, their toxicity, and potential exposure hazard
Waste water would be monitored, but there would be no limits or benchmarks for the levels of contaminants in the water
Automobile manufacturers would not be required to adhere to achieve a specific benchmark for noxious gas output, and cars would not be monitored for their output over time. It is debatable if gas mileage would be a consideration, as the only motivator for manufacturers to increase fuel economy would be the price of fuel and consumer willingness to bear the burden of fuel costs
B is your answer, it can indicate when you are working above, below, or in your target zone.
