claim: […]until we develop a practical, cost-competitive alternative to fossil fuels, it is unlikely that renewable energy will ever make up more than 15-20% of global energy requirements.
evidence: The death toll is estimated to have been 50 million, and possibly as high as 100 million (about 3 to 6 percent of Earth's population at the time), making it one of the deadliest epidemics in human history.