Examlex
What two pollutants react with water to produce acid rain?
Stable Nucleus
An atomic nucleus that is not prone to radioactive decay and remains unchanged over time.
Earth's Crust
The outermost solid shell of the planet, known for being the layer on which we live and where most geological events occur.
Synthetic Substances
Artificial materials created through chemical processes, not found naturally.
Coal
A natural, black or brownish-black sedimentary rock used primarily as a fuel source in electricity generation and steel production.
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