Sediment as you know, is material like sand, gravel, fossil fragments that is transported by natural processes like wind, water flow or the movement of glaciers.

如你所知，沉积物是通过风、水流或冰川运动等自然过程输送的物质，如沙子、砾石、化石碎片等。

youdao

Regardless of how they are transported, fossil fuels contribute to climate change when they're burned.

CNN: Maybe this oil spill will stick

Fossil fuels might be cheaper in many parts of the world - but when they have to be transported in relatively small amounts across thousands of kilometres of ocean, the cost equation changes.

BBC: Tokelau plans an all-renewables future