Answer:
D is the answer
Explanation:
Hydraulic facturing, aka fracking, uses toxic chemicals above some regulations which may lead to a leak into water supplies and therefore contaminate it.
It has not much to do with coal, more to do with oil and natural gases
Because of fracking now making it accessible to reach sources in vast number that were previously unacessible, it leads to decreases in gas prices
Hope this helps :)
Answer:
Cancer cells have nothing to stop them and they keep multiplying without a purpose with nothing to stop them
Explanation:
An increase in A produces and increase in X
This is a positive feed back mechanism. This mechanism enhance or amplify changes. This tends to alter the balance away from equilibrium because one hormone will increase the release of the other hormone. An example of this is the child birth. During labor, oxytocin is released to increase the uterine contraction the release of oxytoocin will be induced by the contractions of uterus. This will go on until the child was born. Just remember positive feedback enhance the original stimulus.
The majority of the Earth's rare earth minerals are found in China, with 97 percent of rare earth trade concentrated in China.
<span>These minerals are called "rare" because thy have unique chemical properties that make them essential for wide-ranging technologies.Some of the arre minerasl are </span><span>aeschynite, allanite, apatite, bastnäsite, britholite, <span>brockite..</span></span>