Choose the best answer.

The clearing of land for agriculture, industry, and other human activities have increased ______ of greenhouse gases.

concentrations

attention

loss

collections

Choose A, B, C, or D that best completes each sentence.

A layer of greenhouse gases - primarily water vapor, and carbon dioxide - acts as a _______  blanket for the Earth, absorbing heat and warming the surface.

thermal

hot

heat

heating

Choose the word or phrase that is CLOSEST in meaning to the underlined part in the following questions.

Environmental groups want a substantial reduction in the emission of greenhouse gases.

release

import

export

charge

Choose the word or phrase that is CLOSEST in meaning to the underlined part in the following questions.

The law bans the import of ivory into the country.

prohibits

encourages

calls for

stimulates

Choose the best answer.

Over $100 million was allocated for the ______ of hazardous chemicals and radioactive waste.

break-up

tidy-up

clear-up

clean-up

Choose A, B, C, or D that best completes each sentence.

All of the disasters resulted from_______ will continue to have a devastating effect on socio-economic development.

floods

climate change

ecological balance

footprint

Choose A, B, C, or D that best completes each sentence.

Carbon dioxide is released through _______  processes such as respiration and volcano eruptions and through                        activities such as deforestation, land use changes, and burning fossil fuels.

human - natural

natural - human

man-made - ordinary

ordinary - man-made

Choose A, B, C, or D that best completes each sentence.

The next dry season will be extremely severe _______ further saltwater intrusion, water  and rain shortages, and heat waves.

because

although

due to

thanks to