The West's biggest energy companies are plowing tens of billions of dollars back into oil and gas extraction rather than pursuing the kind of large-scale transition to green energy sought by environmentalists. Spending plans at ExxonMobil, Chevron, BP, and Shell show the companies putting trust in returns from oil and gas, which equated to record profits this past year, over lower-carbon energy sources. In some cases, the big players are pulling back from previously planned expansions into green ventures to devote more cash to fossil fuels to get through the decade, leading some to criticize the companies for walking back...