Tony Will
President and Chief Executive Officer at CF Industries
Thanks, Martin, and good morning, everyone. Yesterday afternoon we posted our financial results for the first half of 2021 in which we generated adjusted EBITDA of approximately $1 billion. Strong nitrogen demand and lower overall production have tightened the global supply-demand balance, supporting much higher prices than in recent years.
At the same time, energy spreads between North America and high-cost regions have expanded considerably, increasing margin opportunities for our cost advantaged network. These factors helped drive an increase in adjusted EBITDA of nearly 25% compared to last year, and we produced our strongest first half financial results in six years.
Additionally, the business continues to generate strong free cash flow, giving us tremendous flexibility as we focus on achieving investment grade metrics and executing our clean energy initiatives. The first half was not without its challenges, including the natural gas-driven production interruptions we described on the first quarter call. The first half also saw a continued demonstration of the harm the UAN industry in the United States faces from subsidized and dumped imports from Russia and Trinidad.
Until the last few years, UAN earned a substantial premium to other upgraded nitrogen products due to the higher capital investment required to produce it and the meaningful agronomic and operational benefit it offers to farmers. As you can see from our recent results, UAN now trades at a significant discount to all upgraded nitrogen products due to unfair trade practices.
We have taken the necessary steps to address this situation by petitioning the Department of Commerce and International Trade Commission to initiate anti-dumping and countervailing duty investigations. We look forward to the result of the ITC's preliminary vote later this week.
Looking forward, we are very bullish about the next two years. As Bert will describe in a moment, the need to replenish global coarse grains stocks driving agricultural demand along with the impact of increased economic activity driving industrial demand, should support all-time record global nitrogen demand over the next two years.
Forward energy curves are also very favorable over this timeframe. We expect these factors to help keep the global nitrogen supply and demand balance much tighter than we've seen in recent years, supporting an extended period of higher nitrogen pricing and higher margins for our cost advantaged network.
Longer term, we believe increased demand for ammonia and its clean energy attributes will become a significant factor in the tighter supply and demand balance, driving further value for our network. We continue to see broad interest in clean hydrogen and ammonia to help meet the world's clean energy needs.
As we continue to have discussions with market participants, our focus remains on being at the forefront of this significant opportunity, from positioning our network to be the world's leader for blue and green ammonia production to collaborating with other global leaders where our unique capabilities can provide value. We are pleased with the progress we've made and look forward to additional developments in the coming months.
With that, let me turn it over to Bert who'll discuss the global nitrogen outlook in more detail; then Chris will follow to talk about our financial position before I return for some closing comments. Bert?