The giant oil company, Exxon, reclaims the title of world's largest company, as Apple slides

The giant oil company, Exxon, reclaims the title of world's largest company, as Apple slides... http://online.wsj.com/article/SB10001424127887323539804578264024260588396.html ..."Exxon shares have remained relatively steady over the past year, trading around $75 at the low and $90 at the high. The oil conglomerate is slated to report earnings before the start of trading Feb. 1. Analysts polled by Thomson Reuters expect it to report per-share earnings of $2.02 on $117 billion of revenue."

Given how much profits oil corporations take in, shouldn't they spend much more money on alternative energy investments???