At present, Earth is a planet which has the right conditions for developing and sustaining life.

We are not sure that these conditions will continue for many more years. 

Human activity can change the conditions on earth forever.

The future of the planet is in jeopardy! The citizens of the Earth have a duty to protect our planet for our lifetime and beyond. Write an essay from the viewpoint of the Earth in one hundred years explaining why people need to take care of it now.