Types of radioactive dating methods
General worry over water pollution and associated environmental issues greatly concerns more than half of all Americans who participated in the 2016 poll.
Many of the concerns are interconnected, following the web of life.
Contamination of fresh water used for household needs, including pollution of rivers, lakes, and reservoirs, ranks top on the list of environmental concerns for 61% of Americans.
The Environmental Protection Agency (EPA) has set standards to ensure quality of drinking water to protect public health by limiting levels of various contaminants like microorganisms, disinfectants and their byproducts, inorganic compounds, organic compounds and radionuclides.
The world is currently experiencing its sixth extinction event driven by human activities, reports the World Wildlife Fund (WWF).
It is estimated to be 1000-10,000 times faster than natural extinction rates and each year 200-2000 species go extinct.