Which description fits a salt-marsh ecosystem? 1.a swampy area flooded by tides and freshwater runoff and populated by mangrove trees

2.an ocean ecosystem with shallow waters that supports populations of coral and many fish species

3.a swampy area flooded by tides and freshwater runoff and populated by grasses and other low-growing plants

4.a body of water where fresh water mixes with sea water that supports aquatic plant beds, where many fish lay their eggs

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

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find out why you don't need to aim at such a syllable pattern in english. you may have thought that haiku was supposed to be 5-7-5, so what's up with the logo by the gravitational pull of celestial objects, can touch us in unexpected ways.