${1.}$ Yes, they are. ( dẫn chứng: câu 2 )

${2.}$ There is too much smoke in the air in many cities in the world.  ( câu 3 )

${3.}$ We are cutting down many trees, burning the forest and we are also destroying lots of plants and animals. ( "Chúng ta đang làm gì với môi trường của chúng ta?" - câu 4,5,6 )

$#29july$

` 1 ` : Yes they are

` -> `: Thông tin dòng 1 

` 2 ` There are too much smoke in the air in many cities

` -> ` Thông tin dòng 2

` 3 ` : We are cutting down too many trees , We are burning the forest . We also destroying lots of plants and anoimals

` -> ` Thông tin dòng 2 ; 3