Have we missed our chance to stop global warming? A new report has warned that the world is on track to hit a 1.5C temperature increase by 2027.
World on track to break 1.5C climate target
Heating up: If the 1.5C limit is broken, the world will be heading into "uncharted territory", experts say. Glossary
Paris Agreement - An agreement signed by 196 countries to try to limit global warming.
Global warming - The Earth is getting hotter due to climate change.
Climate change - Long-term shifts in temperatures and weather patterns. Human action is a major cause of climate change.
Greenhouse gases - Greenhouse gases, which increase the atmosphere's capacity to hold heat, are vital to life on Earth: without them the planet would be freezing. But human activity is disturbing the delicate balance that created the conditions for life as we know it. Carbon dioxide is responsible for 60% of the manmade greenhouse effect, but we also produce smaller quantities of methane, ozone and nitrous oxide, which are even more damaging.
Sustainable - Able to continue over a long time.