pressure in the leaves ’ cellscausespressure in the leaves ’ cells
bloatingto causebloating
during a routine survey of the Potomac last yearwas discoveredduring a routine survey of the Potomac last year
the occurrence of algae bloomspreventsthe occurrence of algae blooms
alsocan ... setalso
to increased rates of siltation ... slowing of water flow rates , degradation of fish nesting sitescontributeto increased rates of siltation ... slowing of water flow rates , degradation of fish nesting sites
evencontributeseven
diarrheacan causediarrhea
an economic toll on an area ... an important tourist drawcan createan economic toll on an area ... an important tourist draw
massive problems in many parts of the worldhas causedmassive problems in many parts of the world