Two big environmental stories are making waves today. First, a California dairy farmer is using hundreds of thousands of red earthworms and microbes in a ‘vermifiltration’ system to clean manure wastewater, drastically cutting methane, nitrous oxide, and water pollution. This low-tech approach is gaining traction as the livestock industry faces mounting pressure to address its environmental damage. Second, solar geoengineering is moving beyond computer simulations into real-world engineering challenges. Researchers are now grappling with the practical hurdles of building aircraft, materials, and infrastructure needed to actually deploy the technology — and finding it would take serious time and money. Why it matters: These stories highlight a growing tension between nature-based solutions and high-tech climate interventions, forcing us to decide which path is more viable for our future.