Fracking is a way to obtain oil and natural gas trapped in rock. During fracking, a mixture of water, sand, and chemicals are forced into the rock,
causing it to fracture and release the natural gas or oil it contains. Fracking
can harm the environment when it releases water pollution or air pollution
How could scientists best cooperate to use scientific research to prevent this
problem?

A. They could reduce their use of fossil fuels to decrease the demand for fracking.

B. They could avoid fracking when they are studying the environment

C. They could agree to use only fossil fuels from sources other than fracking.

D. They could develop technologies that help prevent the release of pollutants while fracking.

A. They could reduce their use of fossil fuels to decrease the demand for fracking.  

C. They could agree to use only fossil fuels from sources other than fracking.

Explanation:

Scientists prevent the problem of pollution that occurs through fracking is that    they could reduce their use of fossil fuels so in this way decrease the demand for fracking also occur and they could use only fossil fuels from sources other than fracking. These two ways can help to reduce the pollution that occurs due to the process of fracking so we can say that decrease the use of fossil fuel and use of other sources of fossil fuel can reduce this problem.

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."