Explain why transboundary environmental threats like pollution are a problem for both parties, even if one community is principally responsible for the pollution.

d) center of the mid-ocean ridge

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sinserly,

steckh986

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]