Is nuclear fusion the future? The race is heating up to bring star power down to Earth. But some scientists think this technology will only ever be science fiction.
China’s artificial sun sets new world record
Starstruck: Large stars such as the one above produce huge amounts of energy. Glossary
Fossil fuels - Fuels made from decomposing plants and animals, including coal, natural gas and oil. These fuels release carbon dioxide, causing global warming.
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.
Global warming - The Earth is getting hotter due to climate change.
Expensive - Costs a lot of money.
Solar - To do with the sun.