The given column graph illustrates three methods of disposal of waste materials in 2005, 2006, and 2008. It is clear that the landfill method was the most used for waste disposal in 2005, and dumping at sea was used the maximum in 2008.
It is clear that about 2000 million tonnes of waste were disposed of by the landfill method in 2005. Disposal of waste by this method lost popularity gradually, and by 2008, only 1200 million tonnes were disposed of by this method. About 900 million tonnes of waste were burnt, and about 1200 million tonnes were dumped at sea.
In 2006, again the most popular method of waste disposal was landfill; the amount disposed of was less than that in 2005. Just under 1200 million tonnes were disposed of by burning, and a little over 1400 million tonnes were dumped at sea.
In 2008, the most popular method was dumping at sea, and over 1600 million tonnes were disposed of like this. A little under 900 million tonnes were burnt.
Overall, it can be seen that dumping in landfill sites lost popularity, and dumping at sea gained popularity in the given time. The burning method of waste disposal fluctuated over the period.