What percentage of the water on Earth is salt water?

What percentage of freshwater is frozen in ice?

True or False: 48% of freshwater is used by the public.

True or False: Most of the water pollution in the US comes from non point sources.

Which of the following does not impact water quality?

True or False: Too little oxygen in the water can kill marine life.

Nitrates in fertilizer seeping into the water promotes the growth of what type of organism?

Agal bloom is defined as?

Increased carbon dioxide levels in the atmosphere means...?

How much of our atmosphere is nitrogen gas?

True or False: Scientists estimate that human activities such as manufacturing and applying fertilizers to crops have doubled the amount of nitrogen cycling through ecosystems.

The development of desert like conditions due to human activities and/or climate change is known as?

What is NOT an effect of mining?

The portion of precipitation that moves over land and eventually reaches streams, rivers, lakes and oceans is known as?

The development of land for houses and other buildings near a city is called?

Which is NOT an impact of urban sprawl?

Urban sprawl occurred at the same time of what trend?

How much of the total trash in the US ends up in a landfill?

True or False: Trash containing hazardous waste can be thrown in a landfill because it does not affect the health of humans or other living things.

Examples of hazardous waste include all except?

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