<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
If the climate is always changing over the history of the planet, why should we get worked up about global warming?
<|assistant|>
Global warming has caused an accelerated climate change that is more rapid than the natural processes that have occurred on the planet over its history. The main cause of global warming is increasing concentrations of greenhouse gases produced by human activities that have accelerated the rate of climate change and had more profound and long lasting effects on the planet than ever experienced in human history.