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What was the Earth like many, million years ago?
What happened after 2 billion years?
How did the CO2 levels decrease over the years?
What is the earths composition?
What are pollutants?
What are Hydrocarbons?
In which ways can pollutants harm us?
How do you make molecules?
What happens in a chemical reaction?
What are fossil fuels?
What is combustion?
What is Carbon Monoxide and what are its dangers?
What are Carbon Particulates?
How is sulfur dioxide made?
How does sulfur dioxide harm us and how is it removed within the atmosphere?
Where is nitrogen pollution formed?
How do nearby atoms react in the air?
How does nitrogen monoxide form?
Where is nitrogen dioxide formed?
Why are nitrogen oxides similar to sulfur dioxide?
What is wet-scrubbing?
What is the first way of wet-scrubbing?
Is there an alternative way to wet-scrubbing?
How does the government help reduce the CO2 emissions?
What do Catalytic Converters do?
What are biofuels?
What is a disadvantage for biofuels?
How does MOT reduce pollution?
