algal blooms, definition of

A heat pump is an electrically powered mechanical device that takes heat from one location and transfers it to another location. An air conditioner is an example of a heat pump in that it takes heat out of the interior space and then rejects that heat to the outdoors. However, a true heat pump can work in either direction, unlike an air conditioner; in that it can take heat out of an interior space, or it can put heat into an interior space.

• 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
• Study Finds National Park Ecosystems Threatened by Nutrient Pollution
  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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