The transition to electric vehicles (EVs) has accelerated rapidly in recent years, with many major car manufacturers investing heavily in electric mobility. EVs are becoming increasingly common in developed countries. (28) ______, where high costs and limited infrastructure continue to create serious barriers. For this reason, some experts argue that unless several critical conditions are fulfilled, EVs (29) ______.

Two major challenges continue to hinder the wider expansion of EVs. The first is the unstable supply of essential materials such as lithium and cobalt, (30) ______. The second is the limited capacity of existing power grids, which are often unable to cope with the growing demand for large-scale charging. (31) ______.
To overcome such obstacles, researchers are developing lighter batteries, faster charging systems, and cleaner energy solutions. These efforts alone, however, may not be enough without broader support. (32) ______.
(Adapted from https://linguapress.com)