So what of global warming? As we know, carbon dioxide emissions are causing the planet to warm. The best estimates are that the temperatures will rise by 2-3°C in this century, causing considerable problems, at a total cost of US$5,000 billion.
Despite the intuition that something drastic needs to be done about such a costly problem, economic analyses clearly show it will be far more expensive to cut carbon dioxide emissions radically than to pay the costs of adaptation ot the increased temperatures. A model by one of the main authors of the United Nations Climate Change Panel shows how an expected temperature increase of 2.1 degrees in 2100 would only be diminished to an increase of 1.9 degrees. Or to put it another way, the temperature increase that the planet would have experienced in 2094 would be postponed to 2100.
So this does not prevent global warming, but merely buys the world six years. Yet the cost of reducing carbon dioxide emissions, for the United States alone, will be higher than the cost of solving the wolrd\'s single, most pressing health problem: providing universal access to clean drinking water and sanitation. Such measures would avoid 2 million deaths every year, and prevent half a billion people from becoming seriously ill.
It is crucial that we look at the facts if we want to make the best possible decisions for the future. It may be costly to be overly optimistic - but more costly still to be too pessimistic.
33 What aspect of scientific research does the writer express concern about in paragraph 4?
(A) the need to produce results
(B) the lack of financial support
(C) the selection of areas to research
(D) the desire to solve every research problem
34 The writer quotes from the Worldwide Fund for Nature to illustrate how
(A) influential the mass media can be
(B) effective environmental groups can be
(C) the mass media can help groups raise funds
(D) environmental groups can exaggerate their claims
35 What is the writer\'s main point about lobby groups in paragraph 6? 
(A) some are more active than others
(B) some are better organised than others
(C) some receive more criticism than others
(D) some support more important issues than others
36 The writer suggests that newspapers print items that are intended to
(A) educate readers
(B) meet their readers\' expectations
(C) encourage feedback from readers
(D) mislead readers
37 What does the writer say about America\'s waste problem? 
(A) it will increase in line with population growth
(B) it is not as important as we have been led to believe
(C) it has been reduced through public awareness of the issues
(D) it is only significant in certain areas of the country