What allows nongovernmental organizations to play a major role in environmental issues?

NGOs or non-government organizations are organizations which are building by citizens and are free from governmental influence.

These organizations are non-profit means they work for the betterment of people with nothing in return.  

Their nature of being independent and run by funds and donations allows them to work for and play a role in environmental issues.

As I mentioned earlier, these organizations work for the people and their betterment which is another factor that gives them this right.

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explanation:

i believe you meant to say air rather than hair so the answer is below ")

the dead sea, the lowest place on earth at 430 metres (1,410 ft) below sea level, has a correspondingly high typical atmospheric pressure of 1065 hpa.