Complex sentence: Huhne was able to carve out a unique position on the issue of green taxation--he argued for a radical expansion of taxes on pollution, allowing for reductions in the income tax rate on the lowest paid.
Split into simpler sentences: Huhne was able to carve out a distinctive position on the issue of green taxation. He argued for a radical expansion of taxes on pollution, allowing for reductions in the income tax rate on the lowest paid.