The graph depicts the amount of toxic gases that were given off into the atmosphere from different factors in the UK between 1990 and 2005.
Overall, the total percentage of toxic gases emitted into the air witnessed a downward trend, with the gases from the industry being the most significant. The figure for gases emitted into the atmosphere by transport was the highest, except for isolated periods from 2002 to 2005.
The total number of harmful gases being released into the atmosphere stood at approximately 8 million tonnes, after which it declined notably and was lowest at 5 million tonnes by 2005. Similarly, the amount of toxic gases emitted into the air by industry experienced a decrease to around 5 million tonnes in 1996, followed by a final drop to 2 million tonnes in the concluding year.
The data regarding the amount of gases being discharged into the atmosphere by transport witnessed a moderate fluctuation from 1900 to 1996, reaching a significant peak of 3 million tonnes in 2005. An opposite change can be seen in the figure for the number of gases emitted into the atmosphere by households, with the amount of gases remaining unchanged at 1 million tonnes throughout the period but dropping to 0 million tonnes in 2005.