I heard that Tesla is attracting the consumers' attention in the USA car market. The USA government subsidizes the electronic cars, so, their price competitiveness is improved.

However, electronic cars are not appealing to the consumers in the Korean market. First, electronic cars are more expensive than gasoline cars. In addition, their performances are is lower and they are inconvenient. It takes so much time to recharge batteries and it is very difficult to find recharging houses

For electronic cars to be popular, the technology in battery areas should be improved innovatively and the government should support the industry.

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For anything where there's ONLY ONE, it's definite

--The government

--The car industry

Also, nouns like performance, cost, efficency are always singular, so you should use "is"

--> Cost is an important factor when buying a new car.