Answer:
D) all of the above
Explanation:
Typical modern municipal landfills contain all of these features! They include monitoring wells, impermeable barriers, methane retrieval systems, and leachate treatment facilities.
It would be the invention of velcro
Based on altruism, the factors involved in the concept of helping others are time, presence of bystanders and religious beliefs.
<h3>What is altruism?</h3>
Altruism refers to a phenomenon in which a living organism promotes the welfare and comfortability of another organism, especially at his or her own disadvantage or detriment.
This ultimately implies that, altruism is an act through which a living organism show selfness, love, care, affection and concern towards another organism's ordeal (predicament), even at a risk or excessive cost to himself or herself.
Based on altruism, the factors involved in the concept of helping others include th following:
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