(PLS HELP DUE IN 5 MINS) examine the graph below showing a comparison of transportation and emission trends in the united states over the years 1980-2015. which statement best describes the trend for the six common pollutants, as shown in the graph? a) the clean water act addressed the six major pollutants that were damaging the ecosystems.
b) the decline in vehicle miles traveled and US population correlates with a drop in air pollution
c) the 1990 amendments to the clean water act addressed the sources of acid rain, smog, and toxic air pollutants
d) a conversion to 100% renewable resources for energy harnessing and electricity production caused a reduction in air pollution

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.