Question

мы должны бросать мусор в урну,убирать за собой на природе,высаживать больше деревьев и растений

Answer 1

we have to throw garbage into a ballot box, clean up outdoors, land more trees and plants

Answer 2

We must throw rubbish into trashcans, clean up outdoors / remove our rubbish from outdoors, grow (выращивать) more trees and plants.