A Dutch company that presented the world’s first lab-grown beef burger five years ago said Tuesday it has received funding to pursue its plans to make and sell artificially grown meat to restaurants from 2021. Mosa Meat said it raised 7.5 million euros ($8.8 million).

Environmentalists have warned that the world’s growing appetite for meat, particularly in emerging economies such as China, isn’t sustainable because beef, pork and poultry require far greater resources than plant-based proteins. Cows in particular also produce large amounts of greenhouse gas that contribute to global warming.

The big challenge is making meat that looks, feels and tastes like the real thing. Mosa Meat uses a small sample of cells taken from a live animal. Those cells are fed with nutrients so that they grow into strands of muscle tissue. The company claims it could make up to 80,000 quarter pounders from a single sample.

With a number of startups and established players hoping to make cultured meat on a big scale in the coming years, a battle has broken out over the terms used to describe such products. Some advocates have claimed the term “clean meat” while opponents in the traditional farm sector suggest “synthetic meat” is more appropriate.