Precipitation that is more acidic than normal because of air pollution is called

Which of the following is considered a renewable resource?

The contamination of Earth's land, water, or air is called

In the last few centuries, the number of species becoming extinct on Earth has

Which of the following is considered a non-renewable resource?

Which of the following is considered to be Earth's natural resources?

Petroleum is an energy source that is also known as

Earth's resources that cannot be replaced as they are used are called

Fossil fuels are examples of

Resources that can be replaced naturally in a relatively short period of time are called

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