REPUBLIKA.CO.ID, JAKARTA -- Incumbent presidential candidate Joko Widodo's (Jokowi) vision to develop 100 percent blended biodiesel (B100) will be difficult to achieve, Director of Institute for Development of Economics and Finance (Indef) Berly Martawardaya noted. He pointed out that B100 is even difficult to be developed in Europe, where their concern about the environment is relatively higher.

"B100 is a bit difficult to achieve, as most of 100 percent blended biodiesel is not working, while the maximum mixture of biodiesel is usually 40 percent," he said in a phone interview here on Sunday.

Hence, Martawardaya, who is also a lecturer at Business and Economy Faculty of University of Indonesia (UI), deplored Jokowi's renewable energy vision that only highlights palm oil development. In fact, Indonesia has many other potential renewable energy resources, such as wind mill, hydro energy, solar energy, and geothermal.

"When we talk about renewable energy, we used to talking about wind, water, solar, or geothermal energy, but they were not mentioned. It was weird, in fact, some of them has been operating, including a wind mill in Sidrap," he said.