Discuss this question in pairs.
Read the article. What produces a lot of carbon dioxide?
Complete using words from the list.
Now write definitions for the other words in bold in the article in your notebook. You can use a dictionary.
Read the article again and complete the sentences
Did you know?
Work in pairs. Take turns to ask and answer questions about the text on pape 14.
Complete the sentences with the correct form of the verbs in brackets.
Work in pairs. Look at the graph and answer the questions.
Verb + to or -ing
GLOBAL GREENHOUSE GASES