This type of wet and hot climate dominates most of Bangladesh, with year-round temperatures never dropping below 18 degrees Celsius (65 degrees Fahrenheit).

Name one way arsenic can enter the water supply.

The typhoid fever mortality rate of this city averaged 65 of every 100,000 people per year during the late nineteenth century.

Just over 30% of the Earth's fresh water exists in this form.

This tube of metal, plastic, or other material is used to convey water or other fluid substances.

The Sundarbans, an enormous mangrove forest shared by Bangladesh and Eastern India, are home to this species of big cat.

The arsenic contamination of this country's water supply is the most widespread in history.

These pathogens come in three shapes: spherical (cocci), rod (bacili), and spiral (spirilli).

This falls on land at a rate of 7,000 cubic meters per person per year, and over three times that amount falls over water.

This process improves water quality to make it more acceptable for a specific end-use.

The mouth of this historic river empties into the Bay of Bengal on Bangladesh's most southern border.

This layer of the Earth is where arsenic is most commonly found.

In March and April of 1993, an outbreak of cryptosporidiosis infected 400,000 individuals here, in Christian's home state.

This action accounts for 30 percent of water use in industrialized countries, making it those countries' "number two"-greatest source of water demand.

The contamination of bodies of water, usually as a result of human activities.

Bangladesh is the world's second leading producer of this fiber used to make sacks, mats, and rope.

Water treatment systems are generally used to remove these two oxidation states of arsenic.

It's a good choice as an indicator organism for waterborne pathogens, although it may be difficult to quantify.

Fifteen thousand liters of water are required to make a kilogram of this bovine cuisine.

This biological layer forms on the surface of slow sand filters.

The largest city and capital of Bangladesh, it is also the nation's cultural and political hub.

The World Health Organization's standard for arsenic concentration.

Three-fourths of the world's population reside in this "place," which remained non-aligned with either bloc during World War II; a "Fourth" was added in the 1970s.

Your average Oklahoman uses approximately this many gallons (or liters) of water each day.

The Safe Drinking Water Act defines this as any physical, chemical, biological or radiological substance or matter in water.