Natural gas boreholes and oil wells cross through many underground layers. which of the following is a threat or problem with these extraction processes?

a: boreholes and wells are very expensive because they follow strict safety standards

b: radioactive materials are brought to the surface

c: there are no threats or problems, fossil fuel extraction is completely safe

d: pipe casings can leak fossil fuels and fracking fluids into ground water aquifers

Aschool principal ordered 1,000 pencils. he gave an equal number to each of 7 teachers untill had given out as many as possibe. how many pencils were left?

Will someone earth science water cycle: will someone tell me how the water cycle works, but in a story? ? pretend you are a drop of water somewhere. (like; "once i was floating around in a cloud" or, "once i was lying in a puddle in the middle of a parking lot.) and tell your life story! and use the words "evaporation" "condensation" "accumulation" "transpiration" "precipitation" and "runoff" tell the story like your the drop of water telling your life story. include all the parts of the water cycle including those vocabulary words above. and !

Rainbow trout is non- native to the united states. however this species is breeding with the native gula yltrout acientistrecently observed that the hola trout were becoming exitinct what is the cause of their extinction