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- An electrical engineer designs a tracking system. A solar panel tracker increases daily energy by 35%, but adds 1.2 kWh/day for maintenance. If base output is 800 kWh/day, what is net daily output with tracking?
- Increased output: 800 × 1.35 = <<800*1.35=1080>>1080 kWh.
- Net output: 1080 − 1.2 = <<1080-1.2=1078.8>>1078.8 kWh.
- A science policy analyst assesses global impact. If 150 cities each adopt solar systems saving 1,200 tons of CO₂ annually, equivalent to planting 20,000 trees per city, what is the total number of trees equivalent saved per year?
- Trees equivalent per city: 20,000.
- Total for 150 cities: 150 × 20,000 = <<150*20000=3,000,000>>3,000,000.