Amazon was also accused of mistreatment of its warehouse employees. A Pennsylvania paper investigated a local Amazon warehouse and found that workers were forced to endure extreme heat nearing 100 degrees F. Since then, CEO Jeffrey Bezos has pledged to spend $52 million on air conditioning units in distribution centers to address the concern. Amazon began to realize that managing social matters in its supply chain is a growing issue and nearly has doubled the number of audited suppliers between 2011 and 2012, from 159 to 315. A great start, but Amazon still lags far behind competitors.