The graph below shows the amounts of waste produced by three companies over a period of 15 years.
The line graph compares the volume of waste of three companies during the period from 2000 to 2015.
Overall, companies A and B were a similar status that cutting their waste production in these years. By contrast, company C rose its waste production in the same period.
In 2000, the waste production of company A was the highest at 12 tonnes, compared to 8 tonnes of company B and 4 tonnes of company C. Over the following 5 years, the amount of waste output produced by three companies had marginal change. Company A decreased to 11 tonnes in terms of volume of waste. By contrast, companies B and C increased their waste production to 6 and 10 tonnes correspondingly.
From 2005 to 2015, It can be seen that company A and B declined simultaneosly their waste production. It is remarkable, company B reduced significantly to three tonnes while company A reduced to under nine tonnes at end of the period. Company C had the reverse trend which rose volume of waste to seven tonnes in 2010 and eleven tonnes in 2015