Is this Kiara? Or someone else
The pesticide will be in the animals that eat the grasshoppers, in the water table, in humans that eat the animals/crops and drink the water.
If you have choices, it would be really helpful if you'd include them with your question, but I'd say
More than half of the forests in the Czech Republic have been destroyed by pollution.
The best reference to use will be AN ATLAS.
An atlas is a collection of maps. A map is a pictorial representation of an area of land or sea which shows all the physical features of that particular place. Many information about different places can be obtained from maps and these include the longitudes of different places.