Choose the best answer.

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

Choose the word or phrase that is CLOSEST in meaning to the underlined part in the following questions. Some hold the view that an increase in interspecies competition leads to local extinctions and a decrease in diversity.

Choose the best answer.________is the gradual warming of the earth because of heat trapped by carbon dioxide and other gases in the atmosphere.

Choose the best answer. In cold climates, houses need to have walls that will______heat.

Choose the best answer. Ocean water also will expand if it warms, _______further to sea level rise.

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.

Choose the best answer. Greenpeace works to promote public_______of the dangers that threaten our planet today.

Choose the best answer. Over 100 million was allocated for the ______ of hazardous chemicals and radioactive waste.

Choose the best answer. Conjunctivitis caused by the common cold is very __________ and can spread rapidly between people.

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.

Choose the word or phrase that is CLOSEST in meaning to the underlined part in the following questions. Coal-fired power stations must be retrofitted to capture carbon dioxide.

Choose the best answer. A strong greenhouse effect will warm the oceans and partially melt glaciers, increasing ______.

Choose the best answer. The destruction of the rain forests is an______disaster.

Choose the word or phrase that is CLOSEST in meaning to the underlined part in the following questions. Coming on top of the previous years of extreme scarcity of food, however, the longer term economic implications were profound.

Choose the word or phrase that is CLOSEST in meaning to the underlined part in the following questions. Pollution can have disastrous effects on the delicately balanced ecosystem.