Because of this 'back reaction', photochemical pollution is worse away from the actual pollution source itself.

This state Act recognized the flaws of its earlier attempts at photochemical pollution control which had not included an emission standard for oxides of nitrogen.

The relevance of California's policies became even greater when, in the early 1960s, photochemical pollution began to be experienced in cities such as New York and Philadelphia.

The main problem with nitrogen oxide is that it contributes to forms of photochemical pollution such as ozone, which in high levels can cause eye, nose and throat irritation and affect the respiratory system attacking the lungs.

This being so, I should like to ask the Commissioner if there are any plans to investigate the question of worsening pollution as a result of this photochemical pollution and micro particles and the factor of the works for the Olympic Games, which are being carried out without suitable measures being taken to protect citizens' health.