tropospheric ozone and carbon monoxide

• toxic to plants = reduces growth rates of trees and agricultural crops • difficulty breathing and increases asthma rates • production of secondary pollutants in photochemical smogs and acid rain

• a secondary pollutant produced by photochemical reactions involving oxides of nitrogen 1) nitrogen dioxide broken down by UV light into nitrogen monoxide and oxygen 2) the oxygen reacts with O2 forming O3

• levels can be controlled by limiting the primary pollutants that produce it ie catalytic converters, urea sprays ect

produced when carbon-based materials are burnt in a shortage of oxygen ie incomplete combustion of hydrocarbons

• binds to haemoglobin and prevents the carrying of o2 from lungs to the tissues of the body= brain damage/ death • low conc- increases chances of chronic heart disease

catalytic converters- oxides carbon monoxide into carbon dioxide