premise: The level of air pollution in London is at a record high, with the level of nitrogen dioxide (NO2) the highest of any EU country. As a result of such high levels of pollution, the UK has received a number of warnings from the EU for its failure to comply with European laws, and may face a possible fine. In addition to this, experts warn that the levels of pollution will affect the weather; leading to periods of storm like weather throughout the summer months and an increase in temperature in the winter. Such pollutants are particularly problematic for those who run in the city on a regular basis; leading to chest pains, a decrease in lung capacity and coughing and other problems.
hypothesis: Running often in the city does not cause chest pains