Reuters: Australia is on the verge of a boom in renewable energy projects but lack of spending on power lines and an indifferent regulatory environment threaten to hamper even greater investment. Analysts and industry officials say billions are expected to be spent between this year and 2020, with most of the money going on wind farms, which are the least costly option, versus coal and gas, as Australia cracks down on greenhouse gas emissions. Solar power also holds promise in a country …