Today, there are _________ ____________ people living on Earth.

People on the Earth is increasing all the time, and people's need for more __________ to live in, more _______ to grow food and more _____________.

Many human activities are changing natural ___________.

Damage to habitats and habitat loss are among the most serious threats to many plants and animals.

When plants and animals lose their natural habitats, ____________________________.

Habitat loss is causing many __________ to become endangered or _____________.

Human activity can have a positive impact on the environment.

An animal that is _____________ can no longer be found living anywhere on Earth.

IN WHICH COUNTRY COULD WE FIND The Baiji river dolphin?

The Baiji river dolphin was last seen in ______________.