In order to speak about disasters, you need the appropriate vocabulary. Part 1
Deforestation - the cutting or burning down of all the trees in an area;
Destruction - the act or process of destroying something: the threat of nuclear destruction;
Destroy - to damage something so badly that it cannot be used;
Habitat - the natural home of a plant or animal;
Endangered species - a type of animal or plant that may soon no longer exist;

Exploitation - a situation in which someone treats someone else unfairly in order to get money or an advantage for themselves;

Famine - a situation in which a large number of people have little or no food for a long time and many people die;
Starvation - suffering or death caused by lack of food: people dying of starvation in the famine;
Malnutrition - illness or weakness caused by not having enough food to eat, or by not eating good food;
Disaster - a sudden event such as a flood, storm, or accident which causes great damage or suffering;

Disastrous - very bad, or ending in failure;
Overpopulated - a city or country that is overpopulated has too many people;

Poverty - the condition of being extremely poor;
Shanty - a small, roughly built hut made from thin sheets of wood, plastic etc that very poor people live in;
Evaporate - if a liquid evaporates or if something evaporates it, it changes into steam;
Evaporation - the process of changing from a liquid to a gas, or a change from a liquid to a gas;
Slope - if the ground or a surface slopes, it is higher at one end than the other;
Waterlogged - an area that is waterlogged is flooded with water and cannot be used;
Mud - wet earth that has become soft and sticky;
Take its toll (on) - to have a very bad effect on something or someone over a long period of time.

The polar bear's habitat is the icy area of the Arctic.

In 1906 an earthquake destroyed much of San Francisco.

Helping to alleviate poverty in developing countries also helps to reduce environmental destruction.

The vehicles got bogged down in the heavy mud.