Choose the best answer to complete the sentence.

Gases that stop heat from escaping into space are called _______ gases.

Choose the best answer to complete the sentence.

It is stated that we are now in the first stages of a battle for the __________of life on the Earth.

Choose the best answer to complete the sentence.

In Mexico and Central America, more than 65% of the natural _________of the jaguar has been destroyed, mainly due to farming and deforestation.

Choose the best answer to complete the sentence.

Nuclear power plants produce a lot of dangerous waste that they continually need to ________.

Choose the best answer to complete the sentence.

Many native plants have been seriously_________ by the introduction of exotic plants which are taking over.

Choose the best answer to complete the sentence.

Too many products come in ________packaging, and it's so wasteful!

Choose the best answer to complete the sentence.

China, India, Nepal, Vietnam, Indonesia, the Philippines, and other nations of Asia and the Pacific are making substantial commitments to ________their natural resources.

Choose the best answer to complete the sentence.

Many factories _______ harmful pollutants into the atmosphere.