As published in EPA's national water quality inventory report,
40 Percent of rivers and 46 % of lake are considered to be plluted. these sources, called the surface water are vulnerable to pollution discharged of pipesand runof pollutants washing off the lands.
These sources are extremely unsafe to drink and to swim in
<u>Answer:</u>
<em>Formation of Warm front happens when warmer air mass pushes a cooler air mass.
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<u>Explanation:</u>
When warm air mass converged or coalesced with cold air mass then there is formation of fronts. Warm air front is gentle sloping front when two air masses move towards to each other warm and moist air aggressively then actively overrides the cold air front then the resultant front is Warm air front. Weather associated to Warm fronts happens when sky is overcasted with the Nimbostratus clouds, moderate rainfall, mild weather and so on.
Answer:
I don't know what land you are referring to but land is usually fertile because it has the necessary nutrients for the plants to grow. Another reason land is fertile is because there is animal manure on or in the ground in question.
Mark brainliest pls :)
Answer:
7 - a) a small river is called a <em>pond</em>
8 - b) fresh water conservation efforts
