We live on the most beautiful planet, Earth which has very clean and attractive nature full of greenery. Nature is our best friend which provides us all the resources to live here. It gives us water to drink, pure air to breathe, food to eat, land to stay, animals, plants for our other uses, etc for our betterment. We should fully enjoy the nature without disturbing its ecological balance. We should care our nature, make it peaceful, keep it clean and prevent it from the destruction so that we can enjoy our nature forever. Nature is a most precious gift given by the God to us to enjoy but not to harm.
In some places it's true you can find clean nature full of greenery. But not a lot of places any more. Small pockets of parks and nature reserves give us the feeling that we have green space and nature. But look at a map of the world. Every country is covered with ruined landscapes, cities and towns and roads have covered almost everything. There isn't much natural space left to even save.