With all the media reports about climate change, people in your community turn to you to help them figure out if it is really happening. (You are taking an earth science class, after all.) They ask you to generate a commonsense index of climate change that could be used by long-time residents (longer than 20 years) of your community. The index should not be too complicated, so you must identify just three things that an interested resident could observe. For example, they might write down the date that they first observe a robin. Describe three other observations that citizens could make to identify climate change.
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