All forms of non- renewable energy sources are to a greater or lesser (1)_______ polluting , though the type of pollution varies. Coal, in common with other fossil (2)___________, produces sulphur dioxide, though ,in this respect, gas (3)___________ very favorably with coal and oil. The combustion of fossil fuels produces carbon dioxide in (4)_________ greater amounts than plant life can use. This carbon dioxide , by (5)__________in the atmosphere , may well lead to global rises (6)__________ temperature (called the “greenhouse effect”) and such rises could in time have a (7)__________ effect on climate. Nuclear fuel doesn’t emit gases into the atmosphere (8)___________used, but it produces its own highly toxic waste products. Being solid, these are easier to control than the gases emitted by fossil fuels but their presence in growing quantities is (9)____________ very dangerous indeed. All forms of fuel so far (10)__________ add to the earth’s heat load and in this way provide a long term danger to the environment. Question 1. A. degree B. extent C. extension D. amount Question 2. A. energies B. fuels C. resources D. mines Question 3. A. outgrows B. outdoes C. compares D. contrasts Question 4. A. more B. well C. far D. quite Question 5. A. raising B. collecting C. piling D. accumulating Question 6. A. in B. with C. of D. for Question 7. A. deathly B. disastrous C. unfortunate D. terrific Question 8. A. that B. however C. when D. whether Question 9. A. potentially B. merely C. possibly D. extremely Question 10. A. concerned B. complained C. proved D. mentioned