<human>:  How have countries responded to the climate crisis?
<bot>: Many countries around the world have been responding to the climate crisis by increasing renewable energy sources and implementing stricter environmental regulations. In addition, many nations have signed up to ambitious global agreements such as the Paris Agreement, which aims to reduce emissions and maintain global temperature increases to well below 2 degrees Celsius. In recent years, some countries have also committed to net zero emissions targets, setting out plans to reduce emissions and sequester more carbon dioxide than they emit.