(a)[4]
Complete Table 6.1 by filling in the process names for A to D in Fig. 6.1.
(b)[6]
Fill in the missing words in the spaces. Carbon dioxide is a greenhouse gas. Greenhouse gases trap [BLANK] within the atmosphere. Water vapour is the most common greenhouse gas in the atmosphere. Another greenhouse gas is methane, which is released from [BLANK] and [BLANK]. Carbon dioxide and methane emitted by human activities during the past 200 years have added to the [BLANK] greenhouse effect. Other atmospheric pollutants can lead to acid rain. One of these is [BLANK], a waste gas from some power stations. A source of pollution in both aquatic and terrestrial ecosystems is [BLANK] plastics.