Is solar radiation management wrong? Billionaires back plans to simulate volcanic eruptions to dim the sun. But scientists warn the technology could have unintended consequences.
Quick fix for climate change could be deadly
Brilliant or just bizarre? Some scientists want to recreate the effect of erupting volcanoes. Glossary
Ozone layer - A layer of gas around 10 kilometres above the Earth’s surface which absorbs ultraviolet radiation (a type of heat that reaches the planet from the sun). The layer has a very important role as exposure to too much ultraviolet can be bad for living things.
Climate change - Long-term shifts in temperatures and weather patterns. Human action is a major cause of climate change.
Philanthropists - People who donate generously to good causes.
Bill Gates - Founder and former CEO of Microsoft, the company responsible for popularising household computers in the 80s (and still one of the major global tech companies). His house on the shores of Lake Washington is called Xanadu 2.0. It took seven years to build and is seen as an early example of a smart home.
Stratosphere - A layer of the atmosphere which extends for 31 miles above the Earth’s surface.
Regulation - When governments step in to control what (and how) people buy and sell things.
UN - United Nations. An intergovernmental organisation based in New York that aims to maintain international peace and security.
Geoengineering - Deliberate attempts to intervene in the Earth's natural processes to counteract climate change on a large scale.
Net zero - When the gases going into the atmosphere are balanced by those being taken out of it.