To curb our climate crisis, we need to end our dependence on fossil fuels and power the world with renewables. That may have seemed far-fetched a decade ago given the cost of installing wind and solar at the time, but the price of renewables has been falling fast. In 10 years, the price of solar electricity dropped 89%, and the price of onshore wind dropped 70%. Clean energy has already passed its economic tipping point. A 2019 report from the nonprofit Rocky Mountain Institute found that it was cheaper to build and use a combination of renewables like wind and solar than to build new natural gas plants. A 2020 report from Carbon Tracker found that in every single one of the world's energy markets, it's cheaper to invest in renewables than in coal. And now, graphs recently published on Our World in Data, an online science publication, in partnership with Oxford University, starkly visualize that decline. Comparing the price of electricity from new power plants in 2009 and 2019, one graph shows how the price of solar photovoltaic power (from solar panels) plummets from $359 per megawatt hour to $40, the cheapest of any of the power options on the chart and an 89% decrease. In 2009, building a new solar farm was 223% more expensive than building a new coal plant. Now, it's flipped: Electricity from a new coal plant is 177% more expensive than electricity from new solar panels. What caused the switch? Huge leaps in technological advancement.