Bertrand Piccard says we must develop wisdom and respect. He is collecting 1000 solutions which exist already, but then will promote them to attract greater investments. We can rebuild whilst not recreating the harmful environments of the past centuries.
https://bertrandpiccard.com/articles/the-1000-solutions-call
Look for existing solutions yourself and try to work out how you can apply them wherever you live. For example, I just found this one today:
Hot sun drying up drinking water? This company have the answer (In the US)
https://energy.phoenixlb.com/source-hydropanels
Cleaning up steel industry slag heaps:
https://imtech.imt.fr/en/2021/02/17/decontaminating-and-treating-waste-from-the-steel-industry
Cleaning up contaminants from hazardous industries:
https://www.environmental-expert.com/health-safety/decontamination/companies
Keep track and decontaminate military waste. This is what happens if you do not:
https://redgreenandblue.org/2017/09/29/military-lost-track-hazardous-waste-put-us-risk
When the land is clean and healthy, only build green cities:
When industrial production and it’s waste was transferred to countries where labour was cheap and industrial regulation was weak, rich countries could clean up their environments and promote cleaner living conditions at the expense of poorer nations. The industrial harm worldwide must end.
Clean and safe water and sanitation for the world population is a priority:
https://ourworldindata.org/water-access
Drinking Water ATM
If you experience butter cold winter and heatwaves over summer, yet use gas to power heating, then build in to new homes air pumps which run warm air in winter and cold air in summer.