4. The passage describes atmospheric pollution by gases. U…
4. The passage describes atmospheric pollution by gases. Use the following word bank to fill in the blanks: toxic unconscious blood haemoglobin carbon monoxide acid fossil oxygen The release of carbon dioxide comes from the burning of [1] fuels in power stations and in cars and other vehicles. This burning also releases sulfur dioxide and nitrogen dioxide which dissolves in water in clouds to produce [2] rain. If the combustion of these fuels is not complete another gas called [3] is also released. This gas is very toxic and can combine with [4] in the blood. This prevents the delivery of oxygen around the body. Carbon monoxide causes drowsiness and affected people may fall [5] or even die. Carbon dioxide may also contribute to the increase in air temperature referred to as global warming. Gases that contribute to this are known as greenhouse gases. (5)
Read Details