A HELICOPTER IS ……..………… THAN A TRAIN, BUT A PLANE ISIMPORTANT FOR...

1- A helicopter is ……..………… than a train, but a plane is

important for the climate of the world, because they keep the

the ………. of all. (fast)

balance of the carbon dioxide in the atmosphere. In the future

we will have only a few forests because people are cutting

down the trees. If we don’t have enough forests, the climate