Read the text and fill in the gaps with the appropriate word. Compare with a partner. Then explain the words in bold. We all know that our planet is getting warmer. Carbon dioxide (CO2)is the gas that causes global warming. Just 1)_ water gets hotter when it is the sun, CO2 causes the Earth's temperature to increase. Almost everything people do, including driving, eating, getting to school or work, and using energy affect how 2)_ C02 is sent into the atmosphere.
Organisations, worried 3)_ the condition of our planet, have come up with a way to measure how much damage we cause when we go about our daily activities. They call 4)_ measurement a 'footprint' and depending 5)_ our behavior, our footprints can be all different sizes. So, let's see what you can do 6)_ have the smallest carbon footprint possible.
7)_ we know that everything we do affects the planet and we can start to make decisions that will make it healthier. 8)_ big your 'footprint' is. You might be quite surprised!

1) Just 1) like water gets hotter when it is the sun, CO2 causes the Earth's temperature to increase.
Explanation: This sentence is comparing the way water gets hotter in the sun to how CO2 causes the Earth's temperature to increase. The word "just" emphasizes the similarity between the two.
2) Almost everything people do, including driving, eating, getting to school or work, and using energy affect how 2) much CO2 is sent into the atmosphere.
Explanation: This sentence is stating that almost all human activities, such as driving, eating, going to school or work, and using energy, have an impact on the amount of CO2 that is released into the atmosphere. The word "much" indicates the quantity or amount of CO2.
3) Organisations, worried 3) about the condition of our planet, have come up with a way to measure how much damage we cause when we go about our daily activities.
Explanation: This sentence explains that organizations, who are concerned about the state of the planet, have created a method to measure the extent of the harm caused by our daily activities. The word "worried" expresses the organizations' concern or anxiety.
4) They call 4) this measurement a 'footprint' and depending 5) on our behavior, our footprints can be all different sizes.
Explanation: This sentence reveals that organizations refer to this measurement as a 'footprint' and it can have various sizes depending on our behavior. The word "call" is used to indicate the name given to the measurement.
5) So, let's see what you can do 6) to have the smallest carbon footprint possible.
Explanation: This sentence suggests that we should explore what actions we can take in order to achieve the smallest possible carbon footprint. The phrase "can do" highlights the possibility of taking certain actions.
6) 7) Now we know that everything we do affects the planet and we can start to make decisions that will make it healthier.
Explanation: This sentence informs us that our actions have an impact on the planet, and therefore, we can begin to make choices that will have a positive effect on its health. The use of the phrase "can start" emphasizes the potential for making these positive decisions.
7) 8) It's up to us to decide 8) how big our 'footprint' is. You might be quite surprised!
Explanation: This sentence asserts that it is our responsibility to determine the size of our carbon footprint. The phrase "up to us to decide" indicates that we have the power to make this choice. The word "how" emphasizes the degree or size of our footprint, and the phrase "you might be quite surprised" suggests that the outcome could be unexpected.