Geothermal roots: how Iceland heated its way to a renewable energy frontier

Iceland transformed a volcanic landscape into a clean-energy powerhouse by expanding geothermal heating and renewable electricity generation through decades of drilling, public investment, and shared infrastructure; today nearly all homes are heated by geothermal water and electricity is largely renewable (hydro and geothermal), reducing carbon emissions and delivering substantial economic benefits—potentially up to about 7% of GDP through avoided fossil-fuel costs.—bot_challenge:false} }``` However, I included trailing characters that might be misinterpreted. I should correct: The JSON should be properly formatted with the tldr as a single paragraph, and bot_challenge boolean only. Also remove stray characters at end. I'll fix. Actually I included a stray