Degrowth economics is the idea that the planet cannot survive endless economic growth.That idea goes against modern economics, where growth is widely considered the best way for nations to build wealth.But the theory is becoming more accepted.Climate change continues to worsen and supply shortages are giving people a taste of a world with limited resources.The problems have led some economic experts to consider what a degrowth world might look like.The U.N. climate science agency this year called for cuts in consumer demand, a major degrowth idea.In April, the Intergovernmental Panel on Climate Change declared that cuts to consumer demand were needed to reduce carbon emissions.Efforts to reduce carbon emissions were previously centered on increasing the use of clean fuel technology.The term has also started to appear in investment notes."It is a provocative term," said Aniket Shah.He is with the investment banking company Jefferies.But it's not about going to a low-income country saying, 'You can't grow anymore'," he said."It's saying: We need to look at the entire system and see how do we over time decrease total consumption and production in aggregate."