Sales of gas-powered cars in China fell drastically in April, as rising fuel costs added even more pressure to the world’s largest auto market. The China Passenger Car Association reported this week that overall passenger car sales in China fell 21.6 percent year-over-year in April to about 1.4 million vehicles. But a closer look at the numbers suggests that the era of gas cars in China could be coming to an end. New energy vehicles (NEVs), which include battery-powered cars and plug-in hybrids, accounted for roughly 60 percent of China’s passenger vehicle sales in April. Cars powered by other fuel types, including traditional internal combustion engines, made up the remaining 40 percent. NEV sales were down 6.8 percent in April, but the category was dragged down largely by plug-in hybrids, which fell 25 percent. Sales of battery-powered EVs actually grew 2.4 percent. That still does not compare to what happened to gas-powered cars.…