task 1 -pollution&emission (1)

air pollutants

-> air contaminants

= atmospheric pollutants

= polluting/harmful substances in the air

= pollutant emissions

= pollutant emissions

• sources of air pollutants

> contributors of air pollution

= origins of ___

= pollution source in the air

= air pollutant sources

the volume of air pollutants

-> the quantity of air pollutants

= the total emissions/release of air pollutants

= the concentration/level/creation of ___

= pollutant concentration in the air

= air pollutant emissions

structure:

• compare sources of air pollutants in the UK

-> display different factors that caused air pollution

stay at the same level

• = remain constant

*) chỉ sector thải ra nhiều chất ô nhiễm nhất:

-> A was the main producer of air pollutants

= A was the most significant contributor to air pollution

= A was the largest source of air pollutants

= A accounted/recorded for the highest level of air pollutants

= A contributed to greatest volume of air pollutants

• developed in a downward trend 

-> show a clear downtrend

• among all sth (factors/contributors/…)

-> of all sth

when

• -> during which

-> in which (nếu ở trước là 1 khoảng tg nào đó)