A healthy ______ consists of plants, animals, and other organisms interacting with their environment.

The Amazon rainforest has a rich ______, including thousands of different types of plants.

The ______ of this national park includes elephants, monkeys, birds, and other animals.

______ is causing average temperatures around the world to rise.

Protecting ______ means protecting the variety of plants and animals in an area.

Many animal ______ are at risk of disappearing because of human activities.

Forest fires can ______ wildlife populations and their natural habitats.

A flood, earthquake, or hurricane is an example of a natural ______.

The huge oil spill had a ______ effect on marine life in the area.

Many animals are losing their natural ______ because forests are being cleared.

Some rare animals may become ______ if people do not protect them.

The ______ of certain species can negatively affect the whole food chain.

Governments should take action to protect ______ species such as tigers and rhinos.

______ occurs when large areas of forest are cut down for farming or development.

Air ______ is a serious environmental problem in many large cities.

Burning fossil fuels produces large amounts of ______ dioxide.

Countries need to reduce greenhouse gas ______ to slow down climate change.

Solar and wind power are examples of ______ energy sources.

Governments should introduce stricter laws to ______ endangered animals.

Wildlife ______ can help prevent rare animals from becoming extinct.

Climate change is a serious ______ to both humans and wildlife.

Human activities can have a negative ______ on the natural environment.

Factories should reduce the amount of harmful ______ they release into rivers and oceans.

Excessive use of natural resources can lead to environmental ______.

Governments should encourage ______ development that meets human needs without seriously harming nature.

The destruction of forests can cause animals to lose their natural ______.

Some people believe climate change is a more ______ environmental issue than the loss of individual species.

Protecting different species helps maintain the ecological ______ of an area.

Rising sea levels are one serious ______ of global warming.

Climate change, habitat loss, and species extinction are ______ environmental problems that can affect one another.