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 witnessed an increase in their amount of waste in these years. By contrast, company C rose (rise là nội độing từ, không + O được nha. Raise mới là ngoại động từ, + O được) its waste production company C's level of waste production increased in the same period.
In 2000, the waste production of company A was the highest, (nhớ thêm dấu phẩy) 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 underwent a marginal change. Company A decreased to 11 tonnes in terms of volume of waste. By contrast (bị lặp, by contrast trong overview cũng có), 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 (decline là nội động từ, tức là không thể + O được, nên mình đổi lại ha) simultaneously their waste production company A and B's waste disposal simultaneously declined. It is remarkable that company B's figure reduced significantly to three tonnes while company A slightly reduced to under nine tonnes at end of the period. Company C had the reverse trend which rose whose volume of waste rose to seven tonnes in 2010 and eleven tonnes in 2015