Coal combustion and acid rain. http://www.britannica.com/eb/article-9003549/acid-rain?source=youtube_18494
BBC iScience Acid Rain
A fun, engaging and relevant programme, inspiring the viewer to consider the science within and how scientific process can be used to test ideas and develop theories, rather than just looking for a given answer to a known question.
My Chemical Reaction ( Chalk & Vinegar )
The chemical reaction between chalk and vinegar as my chemistry project :D Sorry if there's any mistake.