Because the directors are business and energy is energy, so it would need to have discharges of nitrogen oxide gas, industries such as. Sulfur dioxide Waste water etc.
PTT is a company that operates on power. And Processing Power So it must be with the release of industrial waste. Gases such as nitrogen oxides Sulfur dioxide, water and so on.
Because the PTT is the company business energy, and processing power. So it must be releasing the waste industry. Such as gas oxide of nitrogen, sulfur dioxide, waste water, etc.