For most of the time that humans have inhabited the earth our wastes were only of significance on a local level. In recent decades society has started to take seriously the impact of human actions on the planet in a broader sense. Pollution of the air, land and water comes from a variety of sources and continues to be a major issue for communities and countries across the globe. While measures have been taken to address pollution in various ways across many dimensions – from local waste collection and recycling programs to international hazardous waste protocols -- globalization has magnified the problems as pollution is often exported along with good and services. One of the major challenges of the 21st century is to find ways for a growing human population to reduce the amount and impact of contaminants we discharge to our shared natural resources.
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Heavy metal
A heavy metal is any one of a number of elements that exhibit metallic properties, which includes transition metals lanthanides actinides as well as the metalloids Arsenic and Antimony. Typically...
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