The Mauna Loa Observatory in Hawaii has been collecting data about the atmosphere and climate since the 1950s. The graph below shows some of
their findings. What conclusions can you draw by studying the above the graph?

options:

climate change is a natural process

all climate change is caused by humans

the levels of carbon dioxide in the atmosphere have been increasing since the 1960s

the levels of carbon dioxide in the atmosphere have been decreasing since the 1960s