Some examples of natural substances that contribute to air pollution in the UK are dust and pollen while examples of man-made substances contributing to the problem are gases that come from cars and truck exhaust. Additionally, air pollution is the cause of 10% of all deaths in the United Kingdom coming only second after China with 17%,[2] this is a startling statistic considering China's population is much larger than the UK. Individuals with heart and lung disease are most affected by air pollution, but exposure has also been linked to stroke, diabetes, obesity and dementia.[2] It has been reported in multiple headlines that air pollution kills 29,000 people a year in the United Kingdom.[3] These statistics show just how dangerous and deadly air pollution is but also how much it can affect and contribute to other serious health problems amongst people.