The interior of an accessory dwelling unit sits at the Institute for Business & Home Safety center on Wednesday, April 1, 2026, in Richburg, S.C. (AP Photo/Erik Verduzco)

Lead carpenter David Trull ignites wood cribs for an accessory dwelling unit burn experiment at the Institute for Business & Home Safety center Wednesday, April 1, 2026, in Richburg, S.C. (AP Photo/Erik Verduzco)

A wildfire researcher walks in front of an accessory dwelling unit burning during an experiment at the Institute for Business & Home Safety center on Thursday, April 16, 2026, in Richburg, S.C. (AP Photo/Erik Verduzco)

King Philippe - Filip of Belgium (2nd L) tours the DEME environmental group during a visit on circular economy, recycling and the availability of land in Farciennes on April 21, 2026. The Belgian king is on a two-day interregional business visit to Flanders and Wallonia, organised with the Flemish and Walloon business networks VOKA and AKT, with 40 business leaders from both regions. (Photo by DIRK WAEM / Belga / AFP via Getty Images) / Belgium OUT

King Philippe - Filip of Belgium (C) tours the DEME environmental group during a visit on circular economy, recycling and the availability of land in Farciennes on April 21, 2026. The Belgian king is on a two-day interregional business visit to Flanders and Wallonia, organised with the Flemish and Walloon business networks VOKA and AKT, with 40 business leaders from both regions. (Photo by DIRK WAEM / Belga / AFP via Getty Images) / Belgium OUT

Queen Maxima of the Netherlands (L) poses with a model of a circular chair by artist Joris Laarman, made by startup Plantics, at the Cleantech Park in Arnhem on April 21, 2026. This site is home to more than 140 companies and institutions working on clean technologies for the energy transition and the circular economy. Arnhem has been named SME City 2026. (Photo by Robin van Lonkhuijsen / ANP / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY MENTION OF THE ARTIST UPON PUBLICATION - TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION

Queen Maxima of the Netherlands (L) tours a production line of startup startup Plantics, at the Cleantech Park in Arnhem on April 21, 2026. This site is home to more than 140 companies and institutions working on clean technologies for the energy transition and the circular economy. Arnhem has been named SME City 2026. (Photo by Robin van Lonkhuijsen / ANP / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY MENTION OF THE ARTIST UPON PUBLICATION - TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION

Queen Maxima of the Netherlands takes a seat on a circular chair by artist Joris Laarman, made by startup Plantics, at the Cleantech Park in Arnhem on April 21, 2026. This site is home to more than 140 companies and institutions working on clean technologies for the energy transition and the circular economy. Arnhem has been named SME City 2026. (Photo by Robin van Lonkhuijsen / ANP / AFP via Getty Images) / Netherlands OUT