James C. Fish
President and Chief Executive Officer at Waste Management
Thanks, Ed, and thank you all for joining us. 2022 was another very successful year at WM. Coming into an uncertain 2022, I wouldn't have predicted that we would grow adjusted operating EBITDA by more than 9.5% for the year, and 8.8% for the fourth quarter, all of our recycling was down $59 million for the year on a sharp drop in commodity prices. That's exactly what happened. Strong operational execution and an unweaving commitment to our strategic priorities led to our full year adjusted operating EBITDA growth of $480 million. We achieved this tremendous growth in the face of elevated inflation, a tight labor market and a downturn in the recycled commodity price market. So we're very proud of our results.
Our robust operating EBITDA translated into record cash from operations of more than $4.5 billion, which allowed us to return more than $2.5 billion to our shareholders through dividends and share repurchases. As 2023 kicks off, we're confident that our long-term focus is on sustainable growth, transforming our business through technology and automation are setting us up to meet the changing needs of our customers, our people and our business environment while leveraging our competitive advantages.
Turning to our high-level outlook for 2023. We expect to deliver adjusted operating EBITDA of between $5.825 billion and $5.975 billion in the year ahead, representing growth of just over 7% at the midpoint, which continues the trend of robust operating EBITDA growth that we've delivered since 2019. Since then, we've grown operating EBITDA almost 26%. And at a time when the economic outlook is increasingly uncertain, we're pleased to be anticipating another strong year of earnings growth in 2023.
The essential nature of our service, our diverse customer base and recurring revenue streams provide stability in times of economic uncertainty. Much of the growth in our 2023 outlook comes from deliberate steps that we've already taken to grow revenue and efficiently manage costs. Overall, we're anticipating between 40 basis points and 80 basis points of adjusted operating EBITDA margin expansion in the year ahead, driven by our collection and disposal business.
Moving now to our sustainability growth investment. Let me give you an abbreviated overview of the supplemental deck that was posted to our investors website. The investment in our renewable energy business is a unique opportunity that we simply couldn't afford to mass. You're all aware that since the passage of the subtitle B and associated air quality regulations in the 1980s and '90s. Landfill has been required to install gas collection systems. Historically, we've been collecting our landfill gas, converting much of it into electricity, which provides an earnings stream for us.
Fast forward to present day, with landfill gas designated as a renewable resource, we are increasing the value of the gas that's an inevitable byproduct of most landfills. These RNG plants are simply taking gas that's naturally produced from the landfill and converting it into a cash-generating machine with a three-year projected payback and a far better environmental outcome than the status quo. And our returns far surpass those of our competition by virtue of our CNG fleet, which today represents 74% of our routed vehicles. As a result, we're better positioned to close the loop and capture extremely valuable regulatory RIN credits.
At the same time, the recently enacted Inflation Reduction Act will provide tax credits and benefits that served to amplify the value creation of WM's renewable energy business. The supplemental presentation to the earnings press release provides details on the investments and our projections for cash flow and operating EBITDA growth. But suffice it to say, we view this as a very strong positive for shareholders. We have a number of attractive options for our renewable energy portfolio. Internally, we said there are three possible outcomes from this opportunity, good, really good or great. And we're heading down the great path by owning the landfill gas and renewable energy facilities, generating RINs through our CNG fleet and maximizing the value of new tax benefits to increase the resulting earnings and cash flows.
We're also advancing our planned recycling investments and have provided more details in the supplemental presentation on our website. Our portfolio of projects to automate existing and build new material recovery facilities have three key financial benefits: reduced labor costs, improved product quality that commands a price premium and capacity growth. In the fourth quarter, labor costs per ton at our single-stream automated MRFs improved by 35%. The automation of these plants enable us to reduce 137 positions through attrition in 2022. And in 2023, we expect to reduce labor dependence by another 200 positions.
By the end of 2023, we're anticipating about a 15% increase in processing capacity from our automated facilities and new markets. We will host a virtual information session for investors on April 5 to provide even more insight into our recycling and renewable energy growth plans. Devina will discuss our 2023 capital allocation plans in more detail, but I want to emphasize our confidence in our ability to continue to allocate capital to all of our priorities, including investing in these high-return sustainability growth projects, returning cash to shareholders through dividends and share repurchases and acquiring accretive businesses.
In closing, I want to thank the entire WM team for another fantastic year. We look forward to 2023 as we continue to execute on our operating plans and progress our investments in renewable energy, recycling and automation to drive growth.
I'll now turn the call over to John to discuss our operational results.