People have lived on our planet for many years. They depend on their planet, on the sun, on animals and plants around them. But the planet also depends on them. It can't be healthy if people go on with their destructive activities.Our ecology is becoming worse and worse with every new day.The ecological situation on the planet seems having nothing to do with us in particular. But it does affect our lives. Our health depends on it. We can't breathe polluted air, we can't swim in dirty rivers or drink polluted water. And we want to eat clean food without chemicals.Of course, not all people stay indifferent to these problems.