algal blooms, definition of

Local storm resulting from warm humid air rising in an unstable environment. Air may start moving upward because of unequal surface heating, the lifting of warm air along a frontal zone, or diverging upper-level winds (these diverging winds draw air up beneath them). The scattered thunderstorms that develop in the summer are called airmass thunderstorms because they form in warm, maritime tropical air masses away from other weather fronts. More violent severe thunderstorms form in areas with a strong vertical wind shear that forces the updraft into the mature stage, the most intense stage of the thunderstorm. Severe thunderstorms can produce large hail, forceful winds, flash floods, and tornadoes.

• Lessons from the Chesapeake Bay: How to Save Buzzards Bay from Nitrogen Pollution
    The Chesapeake Bay was formed eighteen thousand years ago when glacial melting generated sea level rise that flooded the Susquehanna River Valley. Today, it is the largest estuary in the USA, covering about 4,500 square miles and spanning across
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  Due to their federally protected status and careful management, it is easy to assume that national parks are safe from the harm of human activity. Unfortunately, many of the parks across the country are vulnerable to nutrient pollution caused by agricultural    

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