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18 hours ago · Onshore wind cost per kilowatt-hour between 1983 and 2017 Onshore wind is an inexpensive source of electric power, cheaper than coal plants and new gas plants. [10] According to BusinessGreen , wind turbines reached grid parity (the point at which the cost of wind power matches traditional sources) in some areas of Europe in the mid-2000s, and in the US around the same time.
18 hours ago · The roof collapsed, spilling many spectators onto a furnace. Of the hundreds of people on the roof, at least 100 people fell four stories to the factory floor. 60 to 100 more people fell directly on top of the furnace, the surface temperature of which was estimated to be around 500 °F (260 °C).
18 hours ago · Hemp yields three to four times more usable fiber per hectare per annum than forests, and hemp does not need pesticides or herbicides. Hemp has a much faster crop yield. It takes about 3–4 months for hemp stalks to reach maturity, while trees can take between 20 and 80 years.
