What is it?
Plant trees / Planting trees
What's he doing?
He is wasting water.
What's he doing?
He isn't picking up litter.
What is it?
Pick up litter / Picking up litter
What's he doing?
He isn't planting trees.
What's she doing?
She isn't planting trees.
What is it?
Waste water / Wasting water
What is it?
Save water / Saving water
What's she doing?
She is picking up litter.
What is it?
Step on trees / Stepping on trees.
What's he doing?
He is stepping on trees.
What's she doing?
She is saving water.
What's he doing?
He is planting trees.
What is it?
Drop litter / Dropping litter
What's he doing?
He is dropping litter.
What's he doing?
He isn't wasting water.