The text boxes in the left panel have been placed in a random order. Restore the original order by dragging the text boxes from the left panel to the right panel.
d) All living things are made of carbon. In the atmosphere, carbon bonds with oxygen to form carbon dioxide, which plants use to grow.
c) When humans burn fossil fuels, the carbon combines with oxygen to form C02 and is released into the atmosphere, where it traps in heat to keep the earth warm.
b) Humans have burned so much fossil fuel, and the earth is getting hotter and hotter, which is called global warming.
a) Once plants and animals die, the carbon they contain can turn into fossil fuels, like coal and oil.